131312988 has 30 divisors (see below), whose sum is σ = 343278936. Its totient is φ = 43770888.

The previous prime is 131312969. The next prime is 131312989. The reversal of 131312988 is 889213131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 202320 + ... + 202967.

Almost surely, 2^131312988 is an apocalyptic number.

131312988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131312988 is an abundant number, since it is smaller than the sum of its proper divisors (211965948).

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

131312988 is a wasteful number, since it uses less digits than its factorization.

131312988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405303 (or 405292 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 131312988 is about 11459.1879293430. The cubic root of 131312988 is about 508.2794616266.

The spelling of 131312988 in words is "one hundred thirty-one million, three hundred twelve thousand, nine hundred eighty-eight".