23901931 has 4 divisors (see below), whose sum is σ = 24027264. Its totient is φ = 23776600.

The previous prime is 23901923. The next prime is 23901947. The reversal of 23901931 is 13910932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23901931 - 2³ = 23901923 is a prime.

It is a super-2 number, since 2×23901931² = 1142604611057522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23901931.

It is not an unprimeable number, because it can be changed into a prime (23901901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62380 + ... + 62761.

It is an arithmetic number, because the mean of its divisors is an integer number (6006816).

Almost surely, 2^23901931 is an apocalyptic number.

23901931 is a deficient number, since it is larger than the sum of its proper divisors (125333).

23901931 is a wasteful number, since it uses less digits than its factorization.

23901931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125332.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 23901931 is about 4888.9601143802. The cubic root of 23901931 is about 288.0564888873.

Subtracting from 23901931 its reverse (13910932), we obtain a palindrome (9990999).

The spelling of 23901931 in words is "twenty-three million, nine hundred one thousand, nine hundred thirty-one".