23457531 has 4 divisors (see below), whose sum is σ = 31276712. Its totient is φ = 15638352.

The previous prime is 23457521. The next prime is 23457541. The reversal of 23457531 is 13575432.

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

It is an interprime number because it is at equal distance from previous prime (23457521) and next prime (23457541).

It is not a de Polignac number, because 23457531 - 2⁹ = 23457019 is a prime.

It is a super-2 number, since 2×23457531² = 1100511521231922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23457521) 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, 3909586 + ... + 3909591.

It is an arithmetic number, because the mean of its divisors is an integer number (7819178).

Almost surely, 2^23457531 is an apocalyptic number.

23457531 is a deficient number, since it is larger than the sum of its proper divisors (7819181).

23457531 is an equidigital number, since it uses as much as digits as its factorization.

23457531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7819180.

The product of its digits is 12600, while the sum is 30.

The square root of 23457531 is about 4843.2975337057. The cubic root of 23457531 is about 286.2600654978.

The spelling of 23457531 in words is "twenty-three million, four hundred fifty-seven thousand, five hundred thirty-one".