131191892 has 24 divisors (see below), whose sum is σ = 247989000. Its totient is φ = 60368256.

The previous prime is 131191891. The next prime is 131191897. The reversal of 131191892 is 298191131.

It can be written as a sum of positive squares in 4 ways, for example, as 52940176 + 78251716 = 7276^2 + 8846^2 .

It is a super-2 number, since 2×131191892² = 34422625053079328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131191891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14534 + ... + 21762.

It is an arithmetic number, because the mean of its divisors is an integer number (10332875).

Almost surely, 2^131191892 is an apocalyptic number.

It is an amenable number.

131191892 is a deficient number, since it is larger than the sum of its proper divisors (116797108).

131191892 is a wasteful number, since it uses less digits than its factorization.

131191892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7595 (or 7593 counting only the distinct ones).

The product of its digits is 3888, while the sum is 35.

The square root of 131191892 is about 11453.9029156004. The cubic root of 131191892 is about 508.1231695470.

The spelling of 131191892 in words is "one hundred thirty-one million, one hundred ninety-one thousand, eight hundred ninety-two".