131321980 has 24 divisors (see below), whose sum is σ = 276127488. Its totient is φ = 52461888.

The previous prime is 131321951. The next prime is 131321987. The reversal of 131321980 is 89123131.

It is a super-2 number, since 2×131321980² = 34490924862240800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321987) 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, 13797 + ... + 21283.

It is an arithmetic number, because the mean of its divisors is an integer number (11505312).

Almost surely, 2^131321980 is an apocalyptic number.

131321980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131321980 is an abundant number, since it is smaller than the sum of its proper divisors (144805508).

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

131321980 is a wasteful number, since it uses less digits than its factorization.

131321980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8373 (or 8371 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 131321980 is about 11459.5802715457. The cubic root of 131321980 is about 508.2910632832.

The spelling of 131321980 in words is "one hundred thirty-one million, three hundred twenty-one thousand, nine hundred eighty".