131345660 has 24 divisors (see below), whose sum is σ = 281032416. Its totient is φ = 51546560.

The previous prime is 131345657. The next prime is 131345699. The reversal of 131345660 is 66543131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60896 + ... + 63015.

It is an arithmetic number, because the mean of its divisors is an integer number (11709684).

Almost surely, 2^131345660 is an apocalyptic number.

131345660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131345660 is an abundant number, since it is smaller than the sum of its proper divisors (149686756).

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

131345660 is a wasteful number, since it uses less digits than its factorization.

131345660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123973 (or 123971 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 131345660 is about 11460.6134216280. The cubic root of 131345660 is about 508.3216131551.

Adding to 131345660 its reverse (66543131), we get a palindrome (197888791).

The spelling of 131345660 in words is "one hundred thirty-one million, three hundred forty-five thousand, six hundred sixty".