131165601 has 32 divisors (see below), whose sum is σ = 208992000. Its totient is φ = 73100160.

The previous prime is 131165549. The next prime is 131165623. The reversal of 131165601 is 106561131.

It is not a de Polignac number, because 131165601 - 2⁶ = 131165537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131165101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40635 + ... + 43743.

It is an arithmetic number, because the mean of its divisors is an integer number (6531000).

Almost surely, 2^131165601 is an apocalyptic number.

It is an amenable number.

131165601 is a deficient number, since it is larger than the sum of its proper divisors (77826399).

131165601 is an equidigital number, since it uses as much as digits as its factorization.

131165601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3160 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 131165601 is about 11452.7551707002. The cubic root of 131165601 is about 508.0892244646.

The spelling of 131165601 in words is "one hundred thirty-one million, one hundred sixty-five thousand, six hundred one".