23131531222320 has 40 divisors (see below), whose sum is σ = 71707746789936. Its totient is φ = 6168408325888.

The previous prime is 23131531222297. The next prime is 23131531222333. The reversal of 23131531222320 is 2322213513132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48190689807 + ... + 48190690286.

Almost surely, 2^{23131531222320} is an apocalyptic number.

23131531222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23131531222320 is an abundant number, since it is smaller than the sum of its proper divisors (48576215567616).

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

23131531222320 is a wasteful number, since it uses less digits than its factorization.

23131531222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96381380109 (or 96381380103 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 23131531222320 its reverse (2322213513132), we get a palindrome (25453744735452).

The spelling of 23131531222320 in words is "twenty-three trillion, one hundred thirty-one billion, five hundred thirty-one million, two hundred twenty-two thousand, three hundred twenty".