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22869231 = 3721114143
BaseRepresentation
bin101011100111…
…1010011101111
31121000212200120
41113033103233
521323303411
62134100023
7365246100
oct127172357
947025616
1022869231
11119aaaa0
1277aa613
1349793b8
1430743a7
15201b106
hex15cf4ef

22869231 has 24 divisors (see below), whose sum is σ = 38697984. Its totient is φ = 11879280.

The previous prime is 22869151. The next prime is 22869241. The reversal of 22869231 is 13296822.

It is a happy number.

It is not a de Polignac number, because 22869231 - 218 = 22607087 is a prime.

It is a super-3 number, since 3×228692313 (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 22869192 and 22869201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22869241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5455 + ... + 8688.

It is an arithmetic number, because the mean of its divisors is an integer number (1612416).

Almost surely, 222869231 is an apocalyptic number.

22869231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22869231 is a deficient number, since it is larger than the sum of its proper divisors (15828753).

22869231 is a wasteful number, since it uses less digits than its factorization.

22869231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14171 (or 14164 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 22869231 is about 4782.1784784761. The cubic root of 22869231 is about 283.8467027937.

The spelling of 22869231 in words is "twenty-two million, eight hundred sixty-nine thousand, two hundred thirty-one".

Divisors: 1 3 7 11 21 33 49 77 147 231 539 1617 14143 42429 99001 155573 297003 466719 693007 1089011 2079021 3267033 7623077 22869231