131897312 has 24 divisors (see below), whose sum is σ = 268051392. Its totient is φ = 63820800.

The previous prime is 131897309. The next prime is 131897317. The reversal of 131897312 is 213798131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131897317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65489 + ... + 67472.

It is an arithmetic number, because the mean of its divisors is an integer number (11168808).

Almost surely, 2^131897312 is an apocalyptic number.

It is an amenable number.

131897312 is an abundant number, since it is smaller than the sum of its proper divisors (136154080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131897312 is a wasteful number, since it uses less digits than its factorization.

131897312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133002 (or 132994 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 131897312 is about 11484.6555020166. The cubic root of 131897312 is about 509.0322697147.

The spelling of 131897312 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, three hundred twelve".