23256331 has 6 divisors (see below), whose sum is σ = 27053340. Its totient is φ = 19933956.

The previous prime is 23256319. The next prime is 23256371. The reversal of 23256331 is 13365232.

It is a happy number.

It is not a de Polignac number, because 23256331 - 2⁷ = 23256203 is a prime.

It is a super-2 number, since 2×23256331² = 1081713863163122, 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 = 23256296 and 23256305.

It is not an unprimeable number, because it can be changed into a prime (23256371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237261 + ... + 237358.

It is an arithmetic number, because the mean of its divisors is an integer number (4508890).

Almost surely, 2^23256331 is an apocalyptic number.

23256331 is a deficient number, since it is larger than the sum of its proper divisors (3797009).

23256331 is an equidigital number, since it uses as much as digits as its factorization.

23256331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474633 (or 474626 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 23256331 is about 4822.4818299295. The cubic root of 23256331 is about 285.4392774410.

The spelling of 23256331 in words is "twenty-three million, two hundred fifty-six thousand, three hundred thirty-one".