23157931 has 8 divisors (see below), whose sum is σ = 23404304. Its totient is φ = 22913280.

The previous prime is 23157853. The next prime is 23157943. The reversal of 23157931 is 13975132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23157931 - 2⁹ = 23157419 is a prime.

It is a super-2 number, since 2×23157931² = 1072579536401522, 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 = 23157893 and 23157902.

It is not an unprimeable number, because it can be changed into a prime (23157331) 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 7 ways as a sum of consecutive naturals, for example, 73831 + ... + 74143.

It is an arithmetic number, because the mean of its divisors is an integer number (2925538).

Almost surely, 2^23157931 is an apocalyptic number.

23157931 is a deficient number, since it is larger than the sum of its proper divisors (246373).

23157931 is a wasteful number, since it uses less digits than its factorization.

23157931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its digits is 5670, while the sum is 31.

The square root of 23157931 is about 4812.2687996412. The cubic root of 23157931 is about 285.0361337176.

The spelling of 23157931 in words is "twenty-three million, one hundred fifty-seven thousand, nine hundred thirty-one".