23206531 has 2 divisors, whose sum is σ = 23206532. Its totient is φ = 23206530.

The previous prime is 23206523. The next prime is 23206537. The reversal of 23206531 is 13560232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23206531 - 2³ = 23206523 is a prime.

It is a super-2 number, since 2×23206531² = 1077086162107922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23206537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11603265 + 11603266.

It is an arithmetic number, because the mean of its divisors is an integer number (11603266).

Almost surely, 2^23206531 is an apocalyptic number.

23206531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23206531 is an equidigital number, since it uses as much as digits as its factorization.

23206531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23206531 is about 4817.3157463467. The cubic root of 23206531 is about 285.2353898135.

Adding to 23206531 its reverse (13560232), we get a palindrome (36766763).

The spelling of 23206531 in words is "twenty-three million, two hundred six thousand, five hundred thirty-one".