131755988 has 24 divisors (see below), whose sum is σ = 283782912. Its totient is φ = 52123104.

The previous prime is 131755979. The next prime is 131755991. The reversal of 131755988 is 889557131.

It is a happy number.

It is a super-2 number, since 2×131755988² = 34719280747712288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180620 + ... + 181347.

It is an arithmetic number, because the mean of its divisors is an integer number (11824288).

Almost surely, 2^131755988 is an apocalyptic number.

It is an amenable number.

131755988 is an abundant number, since it is smaller than the sum of its proper divisors (152026924).

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

131755988 is a wasteful number, since it uses less digits than its factorization.

131755988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361991 (or 361989 counting only the distinct ones).

The product of its digits is 302400, while the sum is 47.

The square root of 131755988 is about 11478.5011216622. The cubic root of 131755988 is about 508.8504004913.

The spelling of 131755988 in words is "one hundred thirty-one million, seven hundred fifty-five thousand, nine hundred eighty-eight".