23231352531 has 4 divisors (see below), whose sum is σ = 30975136712. Its totient is φ = 15487568352.

The previous prime is 23231352527. The next prime is 23231352563. The reversal of 23231352531 is 13525313232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23231352531 - 2² = 23231352527 is a prime.

It is a super-2 number, since 2×23231352531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23231352581) 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, 3871892086 + ... + 3871892091.

It is an arithmetic number, because the mean of its divisors is an integer number (7743784178).

Almost surely, 2^23231352531 is an apocalyptic number.

23231352531 is a deficient number, since it is larger than the sum of its proper divisors (7743784181).

23231352531 is an equidigital number, since it uses as much as digits as its factorization.

23231352531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7743784180.

The product of its digits is 16200, while the sum is 30.

Adding to 23231352531 its reverse (13525313232), we get a palindrome (36756665763).

The spelling of 23231352531 in words is "twenty-three billion, two hundred thirty-one million, three hundred fifty-two thousand, five hundred thirty-one".