131571860 has 36 divisors (see below), whose sum is σ = 321413652. Its totient is φ = 45110016.

The previous prime is 131571841. The next prime is 131571871. The reversal of 131571860 is 68175131.

It can be written as a sum of positive squares in 2 ways, for example, as 18957316 + 112614544 = 4354^2 + 10612^2 .

It is a super-2 number, since 2×131571860² = 34622308687719200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66149 + ... + 68108.

It is an arithmetic number, because the mean of its divisors is an integer number (8928157).

Almost surely, 2^131571860 is an apocalyptic number.

131571860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131571860 is an abundant number, since it is smaller than the sum of its proper divisors (189841792).

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

131571860 is a wasteful number, since it uses less digits than its factorization.

131571860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134280 (or 134271 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 131571860 is about 11470.4777581407. The cubic root of 131571860 is about 508.6132517862.

The spelling of 131571860 in words is "one hundred thirty-one million, five hundred seventy-one thousand, eight hundred sixty".