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155236 = 221972
BaseRepresentation
bin100101111001100100
321212221111
4211321210
514431421
63154404
71214404
oct457144
9255844
10155236
11a66a4
1275a04
1355873
1440804
1530ee1
hex25e64

155236 has 9 divisors (see below), whose sum is σ = 273049. Its totient is φ = 77224.

The previous prime is 155231. The next prime is 155251. The reversal of 155236 is 632551.

Multipling 155236 by its product of digits (900), we get a square (139712400 = 118202).

Adding to 155236 its reverse (632551), we get a palindrome (787787).

155236 = T393 + T394.

It is a happy number.

The square root of 155236 is 394.

It is a perfect power (a square), and thus also a powerful number.

155236 is nontrivially palindromic in base 14.

155236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 152100 + 3136 = 390^2 + 56^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155231) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 690 + ... + 886.

2155236 is an apocalyptic number.

155236 is the 394-th square number.

It is an amenable number.

155236 is a deficient number, since it is larger than the sum of its proper divisors (117813).

155236 is an equidigital number, since it uses as much as digits as its factorization.

155236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 199 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The cubic root of 155236 is about 53.7441024717.

The spelling of 155236 in words is "one hundred fifty-five thousand, two hundred thirty-six".

Divisors: 1 2 4 197 394 788 38809 77618 155236