131031388 has 6 divisors (see below), whose sum is σ = 229304936. Its totient is φ = 65515692.

The previous prime is 131031379. The next prime is 131031409. The reversal of 131031388 is 883130131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16378920 + ... + 16378927.

Almost surely, 2^131031388 is an apocalyptic number.

It is an amenable number.

131031388 is a deficient number, since it is larger than the sum of its proper divisors (98273548).

131031388 is a wasteful number, since it uses less digits than its factorization.

131031388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32757851 (or 32757849 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 131031388 is about 11446.8942512806. The cubic root of 131031388 is about 507.9158673989.

The spelling of 131031388 in words is "one hundred thirty-one million, thirty-one thousand, three hundred eighty-eight".