12331535520 has 96 divisors (see below), whose sum is σ = 39481223040. Its totient is φ = 3234493440.

The previous prime is 12331535509. The next prime is 12331535521. The reversal of 12331535520 is 2553513321.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is not an unprimeable number, because it can be changed into a prime (12331535521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181300 + ... + 239859.

It is an arithmetic number, because the mean of its divisors is an integer number (411262740).

Almost surely, 2^12331535520 is an apocalyptic number.

12331535520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331535520 is an abundant number, since it is smaller than the sum of its proper divisors (27149687520).

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

12331535520 is a wasteful number, since it uses less digits than its factorization.

12331535520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421238 (or 421230 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

The spelling of 12331535520 in words is "twelve billion, three hundred thirty-one million, five hundred thirty-five thousand, five hundred twenty".