23427531 has 6 divisors (see below), whose sum is σ = 33839780. Its totient is φ = 15618348.

The previous prime is 23427527. The next prime is 23427539. The reversal of 23427531 is 13572432.

It is not a de Polignac number, because 23427531 - 2² = 23427527 is a prime.

It is a super-2 number, since 2×23427531² = 1097698417511922, 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 = 23427495 and 23427504.

It is not an unprimeable number, because it can be changed into a prime (23427539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1301521 + ... + 1301538.

Almost surely, 2^23427531 is an apocalyptic number.

23427531 is a deficient number, since it is larger than the sum of its proper divisors (10412249).

23427531 is a wasteful number, since it uses less digits than its factorization.

23427531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603065 (or 2603062 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 23427531 is about 4840.1994793603. The cubic root of 23427531 is about 286.1379801063.

Adding to 23427531 its reverse (13572432), we get a palindrome (36999963).

The spelling of 23427531 in words is "twenty-three million, four hundred twenty-seven thousand, five hundred thirty-one".