131571252 has 18 divisors (see below), whose sum is σ = 332582978. Its totient is φ = 43857072.

The previous prime is 131571229. The next prime is 131571259. The reversal of 131571252 is 252175131.

It can be written as a sum of positive squares in only one way, i.e., 128459556 + 3111696 = 11334^2 + 1764^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131571259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1827343 + ... + 1827414.

Almost surely, 2^131571252 is an apocalyptic number.

131571252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131571252 is an abundant number, since it is smaller than the sum of its proper divisors (201011726).

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

131571252 is a wasteful number, since it uses less digits than its factorization.

131571252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654767 (or 3654762 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 131571252 is about 11470.4512552907. The cubic root of 131571252 is about 508.6124683428.

The spelling of 131571252 in words is "one hundred thirty-one million, five hundred seventy-one thousand, two hundred fifty-two".