131311780 has 24 divisors (see below), whose sum is σ = 277865280. Its totient is φ = 52122720.

The previous prime is 131311769. The next prime is 131311781. The reversal of 131311780 is 87113131.

It is not an unprimeable number, because it can be changed into a prime (131311781) 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, 22440 + ... + 27679.

It is an arithmetic number, because the mean of its divisors is an integer number (11577720).

Almost surely, 2^131311780 is an apocalyptic number.

131311780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131311780 is an abundant number, since it is smaller than the sum of its proper divisors (146553500).

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

131311780 is a wasteful number, since it uses less digits than its factorization.

131311780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50259 (or 50257 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 131311780 is about 11459.1352204257. The cubic root of 131311780 is about 508.2779030007.

The spelling of 131311780 in words is "one hundred thirty-one million, three hundred eleven thousand, seven hundred eighty".