131161604 has 24 divisors (see below), whose sum is σ = 262637760. Its totient is φ = 56144736.

The previous prime is 131161573. The next prime is 131161607. The reversal of 131161604 is 406161131.

It is a self number, because there is not a number n which added to its sum of digits gives 131161604.

It is not an unprimeable number, because it can be changed into a prime (131161607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26234 + ... + 30830.

It is an arithmetic number, because the mean of its divisors is an integer number (10943240).

Almost surely, 2^131161604 is an apocalyptic number.

131161604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131161604 is an abundant number, since it is smaller than the sum of its proper divisors (131476156).

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

131161604 is a wasteful number, since it uses less digits than its factorization.

131161604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5625 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 131161604 is about 11452.5806698752. The cubic root of 131161604 is about 508.0840634233.

The spelling of 131161604 in words is "one hundred thirty-one million, one hundred sixty-one thousand, six hundred four".