23538531 has 8 divisors (see below), whose sum is σ = 31460944. Its totient is φ = 15654240.

The previous prime is 23538503. The next prime is 23538547. The reversal of 23538531 is 13583532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23538531 - 2⁹ = 23538019 is a prime.

It is a super-2 number, since 2×23538531² = 1108124883275922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23534531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8056 + ... + 10581.

It is an arithmetic number, because the mean of its divisors is an integer number (3932618).

Almost surely, 2^23538531 is an apocalyptic number.

23538531 is a deficient number, since it is larger than the sum of its proper divisors (7922413).

23538531 is a wasteful number, since it uses less digits than its factorization.

23538531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19061.

The product of its digits is 10800, while the sum is 30.

The square root of 23538531 is about 4851.6523989255. The cubic root of 23538531 is about 286.5891769702.

The spelling of 23538531 in words is "twenty-three million, five hundred thirty-eight thousand, five hundred thirty-one".