131691268 has 12 divisors (see below), whose sum is σ = 232697920. Its totient is φ = 65206152.

The previous prime is 131691257. The next prime is 131691269. The reversal of 131691268 is 862196131.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (131691269) 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, 159408 + ... + 160231.

Almost surely, 2^131691268 is an apocalyptic number.

It is an amenable number.

131691268 is a deficient number, since it is larger than the sum of its proper divisors (101006652).

131691268 is a wasteful number, since it uses less digits than its factorization.

131691268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319746 (or 319744 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 131691268 is about 11475.6815919578. The cubic root of 131691268 is about 508.7670691953.

The spelling of 131691268 in words is "one hundred thirty-one million, six hundred ninety-one thousand, two hundred sixty-eight".