131721160 has 16 divisors (see below), whose sum is σ = 296372700. Its totient is φ = 52688448.

The previous prime is 131721137. The next prime is 131721197. The reversal of 131721160 is 61127131.

It can be written as a sum of positive squares in 2 ways, for example, as 131469156 + 252004 = 11466^2 + 502^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646475 + ... + 1646554.

Almost surely, 2^131721160 is an apocalyptic number.

131721160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131721160 is an abundant number, since it is smaller than the sum of its proper divisors (164651540).

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

131721160 is a wasteful number, since it uses less digits than its factorization.

131721160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293040 (or 3293036 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 131721160 is about 11476.9839243592. The cubic root of 131721160 is about 508.8055605216.

Adding to 131721160 its reverse (61127131), we get a palindrome (192848291).

The spelling of 131721160 in words is "one hundred thirty-one million, seven hundred twenty-one thousand, one hundred sixty".