557287831 has 4 divisors (see below), whose sum is σ = 558141912. Its totient is φ = 556433752.

The previous prime is 557287823. The next prime is 557287847. The reversal of 557287831 is 138782755.

557287831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557287831 - 2³ = 557287823 is a prime.

It is a super-2 number, since 2×557287831² = 621139453161369122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557287891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426061 + ... + 427366.

It is an arithmetic number, because the mean of its divisors is an integer number (139535478).

Almost surely, 2^557287831 is an apocalyptic number.

557287831 is a deficient number, since it is larger than the sum of its proper divisors (854081).

557287831 is an equidigital number, since it uses as much as digits as its factorization.

557287831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854080.

The product of its digits is 470400, while the sum is 46.

The square root of 557287831 is about 23606.9445502801. The cubic root of 557287831 is about 822.9242366355.

The spelling of 557287831 in words is "five hundred fifty-seven million, two hundred eighty-seven thousand, eight hundred thirty-one".