557161731 has 24 divisors (see below), whose sum is σ = 920730720. Its totient is φ = 318041856.

The previous prime is 557161697. The next prime is 557161741. The reversal of 557161731 is 137161755.

557161731 is a `hidden beast` number, since 5 + 5 + 7 + 1 + 617 + 31 = 666.

It is not a de Polignac number, because 557161731 - 2⁹ = 557161219 is a prime.

It is a super-2 number, since 2×557161731² = 620858388981832722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (557161741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63211 + ... + 71483.

It is an arithmetic number, because the mean of its divisors is an integer number (38363780).

Almost surely, 2^557161731 is an apocalyptic number.

557161731 is a deficient number, since it is larger than the sum of its proper divisors (363568989).

557161731 is a wasteful number, since it uses less digits than its factorization.

557161731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9355 (or 9352 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The square root of 557161731 is about 23604.2735749271. The cubic root of 557161731 is about 822.8621630424.

The spelling of 557161731 in words is "five hundred fifty-seven million, one hundred sixty-one thousand, seven hundred thirty-one".