23156231 has 16 divisors (see below), whose sum is σ = 28512000. Its totient is φ = 18361728.

The previous prime is 23156219. The next prime is 23156249. The reversal of 23156231 is 13265132.

It is not a de Polignac number, because 23156231 - 2¹⁴ = 23139847 is a prime.

It is a super-2 number, since 2×23156231² = 1072422068250722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23156197 and 23156206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3695 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (1782000).

Almost surely, 2^23156231 is an apocalyptic number.

23156231 is a deficient number, since it is larger than the sum of its proper divisors (5355769).

23156231 is a wasteful number, since it uses less digits than its factorization.

23156231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118.

The product of its digits is 1080, while the sum is 23.

The square root of 23156231 is about 4812.0921645372. The cubic root of 23156231 is about 285.0291588100.

The spelling of 23156231 in words is "twenty-three million, one hundred fifty-six thousand, two hundred thirty-one".