23086531 has 4 divisors (see below), whose sum is σ = 24862432. Its totient is φ = 21310632.

The previous prime is 23086529. The next prime is 23086543. The reversal of 23086531 is 13568032.

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 23086531 - 2¹ = 23086529 is a prime.

It is a super-2 number, since 2×23086531² = 1065975827227922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23086531.

It is not an unprimeable number, because it can be changed into a prime (23083531) 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, 887931 + ... + 887956.

It is an arithmetic number, because the mean of its divisors is an integer number (6215608).

Almost surely, 2^23086531 is an apocalyptic number.

23086531 is a deficient number, since it is larger than the sum of its proper divisors (1775901).

23086531 is a wasteful number, since it uses less digits than its factorization.

23086531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775900.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23086531 is about 4804.8445344256. The cubic root of 23086531 is about 284.7428931903.

The spelling of 23086531 in words is "twenty-three million, eighty-six thousand, five hundred thirty-one".