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156222 = 23311263
BaseRepresentation
bin100110001000111110
321221022000
4212020332
514444342
63203130
71220313
oct461076
9257260
10156222
11a7410
12764a6
1356151
1440d0a
153144c
hex2623e

156222 has 32 divisors (see below), whose sum is σ = 380160. Its totient is φ = 47160.

The previous prime is 156217. The next prime is 156227. The reversal of 156222 is 222651.

156222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (156217) and next prime (156227).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

156222 is a modest number, since divided by 222 gives 156 as remainder.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 156195 and 156204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463 + ... + 725.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2156222 is an apocalyptic number.

156222 is the 198-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190080).

156222 is an abundant number, since it is smaller than the sum of its proper divisors (223938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156222 is a wasteful number, since it uses less digits than its factorization.

156222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 279 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 156222 is about 395.2492884244. The cubic root of 156222 is about 53.8576497695.

Adding to 156222 its reverse (222651), we get a palindrome (378873).

It can be divided in two parts, 156 and 222, that added together give a triangular number (378 = T27).

The spelling of 156222 in words is "one hundred fifty-six thousand, two hundred twenty-two".

Divisors: 1 2 3 6 9 11 18 22 27 33 54 66 99 198 263 297 526 594 789 1578 2367 2893 4734 5786 7101 8679 14202 17358 26037 52074 78111 156222