131756621 has 8 divisors (see below), whose sum is σ = 140066400. Its totient is φ = 123584400.

The previous prime is 131756609. The next prime is 131756623. The reversal of 131756621 is 126657131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131756621 - 2¹⁴ = 131740237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131756623) 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, 32411 + ... + 36248.

It is an arithmetic number, because the mean of its divisors is an integer number (17508300).

Almost surely, 2^131756621 is an apocalyptic number.

It is an amenable number.

131756621 is a deficient number, since it is larger than the sum of its proper divisors (8309779).

131756621 is a wasteful number, since it uses less digits than its factorization.

131756621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68779.

The product of its digits is 7560, while the sum is 32.

The square root of 131756621 is about 11478.5286949156. The cubic root of 131756621 is about 508.8512153861.

The spelling of 131756621 in words is "one hundred thirty-one million, seven hundred fifty-six thousand, six hundred twenty-one".