557231 has 4 divisors (see below), whose sum is σ = 570864. Its totient is φ = 543600.

The previous prime is 557201. The next prime is 557261. The reversal of 557231 is 132755.

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

It is an interprime number because it is at equal distance from previous prime (557201) and next prime (557261).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557231 is a prime.

It is a super-2 number, since 2×557231² = 621012774722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 557197 and 557206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557201) 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, 6755 + ... + 6836.

It is an arithmetic number, because the mean of its divisors is an integer number (142716).

2⁵⁵⁷²³¹ is an apocalyptic number.

557231 is a deficient number, since it is larger than the sum of its proper divisors (13633).

557231 is a wasteful number, since it uses less digits than its factorization.

557231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13632.

The product of its digits is 1050, while the sum is 23.

The square root of 557231 is about 746.4790686952. The cubic root of 557231 is about 82.2896262344.

Adding to 557231 its reverse (132755), we get a palindrome (689986).

The spelling of 557231 in words is "five hundred fifty-seven thousand, two hundred thirty-one".