557831 has 2 divisors, whose sum is σ = 557832. Its totient is φ = 557830.

The previous prime is 557803. The next prime is 557857. The reversal of 557831 is 138755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557831 - 2¹⁴ = 541447 is a prime.

It is a super-2 number, since 2×557831² = 622350849122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 557794 and 557803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278915 + 278916.

It is an arithmetic number, because the mean of its divisors is an integer number (278916).

2⁵⁵⁷⁸³¹ is an apocalyptic number.

557831 is a deficient number, since it is larger than the sum of its proper divisors (1).

557831 is an equidigital number, since it uses as much as digits as its factorization.

557831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 29.

The square root of 557831 is about 746.8808472574. The cubic root of 557831 is about 82.3191508332.

The spelling of 557831 in words is "five hundred fifty-seven thousand, eight hundred thirty-one".