131324660 has 24 divisors (see below), whose sum is σ = 292005000. Its totient is φ = 49439744.

The previous prime is 131324659. The next prime is 131324663. The reversal of 131324660 is 66423131.

It can be written as a sum of positive squares in 4 ways, for example, as 66650896 + 64673764 = 8164^2 + 8042^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131324663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192785 + ... + 193464.

It is an arithmetic number, because the mean of its divisors is an integer number (12166875).

Almost surely, 2^131324660 is an apocalyptic number.

131324660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131324660 is an abundant number, since it is smaller than the sum of its proper divisors (160680340).

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

131324660 is a wasteful number, since it uses less digits than its factorization.

131324660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386275 (or 386273 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 131324660 is about 11459.6972036786. The cubic root of 131324660 is about 508.2945209699.

Adding to 131324660 its reverse (66423131), we get a palindrome (197747791).

The spelling of 131324660 in words is "one hundred thirty-one million, three hundred twenty-four thousand, six hundred sixty".