131706523172 has 18 divisors (see below), whose sum is σ = 268116851142. Its totient is φ = 56445652704.

The previous prime is 131706523159. The next prime is 131706523183. The reversal of 131706523172 is 271325607131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 131387400676 + 319122496 = 362474^2 + 17864^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 335985833 + ... + 335986224.

It is an arithmetic number, because the mean of its divisors is an integer number (14895380619).

Almost surely, 2^131706523172 is an apocalyptic number.

It is an amenable number.

131706523172 is an abundant number, since it is smaller than the sum of its proper divisors (136410327970).

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

131706523172 is a wasteful number, since it uses less digits than its factorization.

131706523172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671972075 (or 671972066 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 131706523172 in words is "one hundred thirty-one billion, seven hundred six million, five hundred twenty-three thousand, one hundred seventy-two".