557398731 has 16 divisors (see below), whose sum is σ = 765561888. Its totient is φ = 360518400.

The previous prime is 557398729. The next prime is 557398741. The reversal of 557398731 is 137893755.

557398731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 557398731 - 2¹ = 557398729 is a prime.

It is a super-2 number, since 2×557398731² = 621386690640820722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (557398741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9745 + ... + 34781.

It is an arithmetic number, because the mean of its divisors is an integer number (47847618).

Almost surely, 2^557398731 is an apocalyptic number.

557398731 is a deficient number, since it is larger than the sum of its proper divisors (208163157).

557398731 is a wasteful number, since it uses less digits than its factorization.

557398731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25262.

The product of its digits is 793800, while the sum is 48.

The square root of 557398731 is about 23609.2933185218. The cubic root of 557398731 is about 822.9788201856.

The spelling of 557398731 in words is "five hundred fifty-seven million, three hundred ninety-eight thousand, seven hundred thirty-one".