131540660 has 12 divisors (see below), whose sum is σ = 276235428. Its totient is φ = 52616256.

The previous prime is 131540659. The next prime is 131540681. The reversal of 131540660 is 66045131.

It can be written as a sum of positive squares in 2 ways, for example, as 42954916 + 88585744 = 6554^2 + 9412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3288497 + ... + 3288536.

It is an arithmetic number, because the mean of its divisors is an integer number (23019619).

Almost surely, 2^131540660 is an apocalyptic number.

131540660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131540660 is an abundant number, since it is smaller than the sum of its proper divisors (144694768).

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

131540660 is a wasteful number, since it uses less digits than its factorization.

131540660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577042 (or 6577040 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 131540660 is about 11469.1176644064. The cubic root of 131540660 is about 508.5730456511.

Adding to 131540660 its reverse (66045131), we get a palindrome (197585791).

The spelling of 131540660 in words is "one hundred thirty-one million, five hundred forty thousand, six hundred sixty".