23131311232 has 128 divisors (see below), whose sum is σ = 49007001600. Its totient is φ = 10852807680.

The previous prime is 23131311223. The next prime is 23131311241. The reversal of 23131311232 is 23211313132.

It is an interprime number because it is at equal distance from previous prime (23131311223) and next prime (23131311241).

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63027913 + ... + 63028279.

It is an arithmetic number, because the mean of its divisors is an integer number (382867200).

Almost surely, 2^23131311232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24503500800).

23131311232 is an abundant number, since it is smaller than the sum of its proper divisors (25875690368).

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

23131311232 is a wasteful number, since it uses less digits than its factorization.

23131311232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 742 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 23131311232 its reverse (23211313132), we get a palindrome (46342624364).

The spelling of 23131311232 in words is "twenty-three billion, one hundred thirty-one million, three hundred eleven thousand, two hundred thirty-two".