131979231992 has 32 divisors (see below), whose sum is σ = 260832403200. Its totient is φ = 62433180000.

The previous prime is 131979231889. The next prime is 131979232003. The reversal of 131979231992 is 299132979131.

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, 463934 + ... + 692237.

It is an arithmetic number, because the mean of its divisors is an integer number (8151012600).

Almost surely, 2^131979231992 is an apocalyptic number.

It is an amenable number.

131979231992 is a deficient number, since it is larger than the sum of its proper divisors (128853171208).

131979231992 is a wasteful number, since it uses less digits than its factorization.

131979231992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156947 (or 1156943 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 56.

The spelling of 131979231992 in words is "one hundred thirty-one billion, nine hundred seventy-nine million, two hundred thirty-one thousand, nine hundred ninety-two".