131181867 has 12 divisors (see below), whose sum is σ = 189595224. Its totient is φ = 87403680.

The previous prime is 131181859. The next prime is 131181881. The reversal of 131181867 is 768181131.

It is a happy number.

It is not a de Polignac number, because 131181867 - 2³ = 131181859 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (131181467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18492 + ... + 24582.

It is an arithmetic number, because the mean of its divisors is an integer number (15799602).

Almost surely, 2^131181867 is an apocalyptic number.

131181867 is a deficient number, since it is larger than the sum of its proper divisors (58413357).

131181867 is a wasteful number, since it uses less digits than its factorization.

131181867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490 (or 8487 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 131181867 is about 11453.4652834852. The cubic root of 131181867 is about 508.1102265100.

The spelling of 131181867 in words is "one hundred thirty-one million, one hundred eighty-one thousand, eight hundred sixty-seven".