131191664 has 20 divisors (see below), whose sum is σ = 259593504. Its totient is φ = 64199808.

The previous prime is 131191631. The next prime is 131191681. The reversal of 131191664 is 466191131.

It is a super-2 number, since 2×131191664² = 34422505406177792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131191664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86477 + ... + 87980.

Almost surely, 2^131191664 is an apocalyptic number.

It is an amenable number.

131191664 is a deficient number, since it is larger than the sum of its proper divisors (128401840).

131191664 is a wasteful number, since it uses less digits than its factorization.

131191664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174512 (or 174506 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 131191664 is about 11453.8929626568. The cubic root of 131191664 is about 508.1228751890.

The spelling of 131191664 in words is "one hundred thirty-one million, one hundred ninety-one thousand, six hundred sixty-four".