131018988 has 24 divisors (see below), whose sum is σ = 306936000. Its totient is φ = 43498000.

The previous prime is 131018963. The next prime is 131019029. The reversal of 131018988 is 889810131.

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, 18738 + ... + 24761.

It is an arithmetic number, because the mean of its divisors is an integer number (12789000).

Almost surely, 2^131018988 is an apocalyptic number.

It is an amenable number.

131018988 is an abundant number, since it is smaller than the sum of its proper divisors (175917012).

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

131018988 is a wasteful number, since it uses less digits than its factorization.

131018988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43757 (or 43755 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 39.

The square root of 131018988 is about 11446.3526068351. The cubic root of 131018988 is about 507.8998448882.

The spelling of 131018988 in words is "one hundred thirty-one million, eighteen thousand, nine hundred eighty-eight".