23531530 has 64 divisors (see below), whose sum is σ = 49268736. Its totient is φ = 8008000.

The previous prime is 23531527. The next prime is 23531533. The reversal of 23531530 is 3513532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23531527) and next prime (23531533).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (23531533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179565 + ... + 179695.

It is an arithmetic number, because the mean of its divisors is an integer number (769824).

Almost surely, 2^23531530 is an apocalyptic number.

23531530 is an abundant number, since it is smaller than the sum of its proper divisors (25737206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23531530 is a wasteful number, since it uses less digits than its factorization.

23531530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 23531530 is about 4850.9308385092. The cubic root of 23531530 is about 286.5607610114.

It can be divided in two parts, 2353 and 1530, that added together give a palindrome (3883).

The spelling of 23531530 in words is "twenty-three million, five hundred thirty-one thousand, five hundred thirty".