23942531 has 4 divisors (see below), whose sum is σ = 24117432. Its totient is φ = 23767632.

The previous prime is 23942521. The next prime is 23942533. The reversal of 23942531 is 13524932.

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 23942531 - 2¹⁰ = 23941507 is a prime.

It is a super-2 number, since 2×23942531² = 1146489581371922, 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 = 23942494 and 23942503.

It is not an unprimeable number, because it can be changed into a prime (23942533) 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 3 ways as a sum of consecutive naturals, for example, 87245 + ... + 87518.

It is an arithmetic number, because the mean of its divisors is an integer number (6029358).

Almost surely, 2^23942531 is an apocalyptic number.

23942531 is a deficient number, since it is larger than the sum of its proper divisors (174901).

23942531 is a wasteful number, since it uses less digits than its factorization.

23942531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174900.

The product of its digits is 6480, while the sum is 29.

The square root of 23942531 is about 4893.1105648657. The cubic root of 23942531 is about 288.2194949348.

The spelling of 23942531 in words is "twenty-three million, nine hundred forty-two thousand, five hundred thirty-one".