131075172 has 36 divisors (see below), whose sum is σ = 343602896. Its totient is φ = 43691400.

The previous prime is 131075171. The next prime is 131075179. The reversal of 131075172 is 271570131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131075171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66454 + ... + 68397.

Almost surely, 2^131075172 is an apocalyptic number.

131075172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131075172 is an abundant number, since it is smaller than the sum of its proper divisors (212527724).

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

131075172 is a wasteful number, since it uses less digits than its factorization.

131075172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134870 (or 134856 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 131075172 is about 11448.8065753597. The cubic root of 131075172 is about 507.9724342824.

The spelling of 131075172 in words is "one hundred thirty-one million, seventy-five thousand, one hundred seventy-two".