131217357320 has 32 divisors (see below), whose sum is σ = 337416062400. Its totient is φ = 44988808128.

The previous prime is 131217357269. The next prime is 131217357329. The reversal of 131217357320 is 23753712131.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (131217357329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234316430 + ... + 234316989.

It is an arithmetic number, because the mean of its divisors is an integer number (10544251950).

Almost surely, 2^131217357320 is an apocalyptic number.

131217357320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131217357320 is an abundant number, since it is smaller than the sum of its proper divisors (206198705080).

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

131217357320 is a wasteful number, since it uses less digits than its factorization.

131217357320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468633437 (or 468633433 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 131217357320 in words is "one hundred thirty-one billion, two hundred seventeen million, three hundred fifty-seven thousand, three hundred twenty".