23239531 has 8 divisors (see below), whose sum is σ = 26763264. Its totient is φ = 19766760.

The previous prime is 23239529. The next prime is 23239537. The reversal of 23239531 is 13593232.

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

It is a cyclic number.

It is not a de Polignac number, because 23239531 - 2¹ = 23239529 is a prime.

It is a super-2 number, since 2×23239531² = 1080151602199922, 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 23239531.

It is not an unprimeable number, because it can be changed into a prime (23239537) 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, 11755 + ... + 13588.

It is an arithmetic number, because the mean of its divisors is an integer number (3345408).

Almost surely, 2^23239531 is an apocalyptic number.

23239531 is a deficient number, since it is larger than the sum of its proper divisors (3523733).

23239531 is a wasteful number, since it uses less digits than its factorization.

23239531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25481.

The product of its digits is 4860, while the sum is 28.

The square root of 23239531 is about 4820.7396735356. The cubic root of 23239531 is about 285.3705286341.

The spelling of 23239531 in words is "twenty-three million, two hundred thirty-nine thousand, five hundred thirty-one".