131564860 has 24 divisors (see below), whose sum is σ = 315756000. Its totient is φ = 45107904.

The previous prime is 131564833. The next prime is 131564863. The reversal of 131564860 is 68465131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131564863) 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, 469735 + ... + 470014.

It is an arithmetic number, because the mean of its divisors is an integer number (13156500).

Almost surely, 2^131564860 is an apocalyptic number.

131564860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131564860 is an abundant number, since it is smaller than the sum of its proper divisors (184191140).

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

131564860 is a wasteful number, since it uses less digits than its factorization.

131564860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939765 (or 939763 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 131564860 is about 11470.1726229382. The cubic root of 131564860 is about 508.6042317321.

The spelling of 131564860 in words is "one hundred thirty-one million, five hundred sixty-four thousand, eight hundred sixty".