23500531 has 4 divisors (see below), whose sum is σ = 23514952. Its totient is φ = 23486112.

The previous prime is 23500523. The next prime is 23500541. The reversal of 23500531 is 13500532.

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 23500531 - 2³ = 23500523 is a prime.

It is a super-2 number, since 2×23500531² = 1104549914563922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23500499 and 23500508.

It is not an unprimeable number, because it can be changed into a prime (23500501) 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, 4401 + ... + 8146.

It is an arithmetic number, because the mean of its divisors is an integer number (5878738).

Almost surely, 2^23500531 is an apocalyptic number.

23500531 is a deficient number, since it is larger than the sum of its proper divisors (14421).

23500531 is a wasteful number, since it uses less digits than its factorization.

23500531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14420.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 23500531 is about 4847.7346255751. The cubic root of 23500531 is about 286.4348731697.

Subtracting from 23500531 its reverse (13500532), we obtain a palindrome (9999999).

The spelling of 23500531 in words is "twenty-three million, five hundred thousand, five hundred thirty-one".