131159992 has 8 divisors (see below), whose sum is σ = 245925000. Its totient is φ = 65579992.

The previous prime is 131159969. The next prime is 131159999. The reversal of 131159992 is 299951131.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131159999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8197492 + ... + 8197507.

It is an arithmetic number, because the mean of its divisors is an integer number (30740625).

Almost surely, 2^131159992 is an apocalyptic number.

It is an amenable number.

131159992 is a deficient number, since it is larger than the sum of its proper divisors (114765008).

131159992 is a wasteful number, since it uses less digits than its factorization.

131159992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16395005 (or 16395001 counting only the distinct ones).

The product of its digits is 21870, while the sum is 40.

The square root of 131159992 is about 11452.5102925079. The cubic root of 131159992 is about 508.0819819329.

The spelling of 131159992 in words is "one hundred thirty-one million, one hundred fifty-nine thousand, nine hundred ninety-two".