557131231 has 4 divisors (see below), whose sum is σ = 581354352. Its totient is φ = 532908112.

The previous prime is 557131219. The next prime is 557131241. The reversal of 557131231 is 132131755.

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 557131231 - 2¹⁷ = 557000159 is a prime.

It is a super-2 number, since 2×557131231² = 620790417111150722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 557131231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557131241) 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, 12111526 + ... + 12111571.

It is an arithmetic number, because the mean of its divisors is an integer number (145338588).

Almost surely, 2^557131231 is an apocalyptic number.

557131231 is a deficient number, since it is larger than the sum of its proper divisors (24223121).

557131231 is a wasteful number, since it uses less digits than its factorization.

557131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24223120.

The product of its digits is 3150, while the sum is 28.

The square root of 557131231 is about 23603.6274966370. The cubic root of 557131231 is about 822.8471478008.

Adding to 557131231 its reverse (132131755), we get a palindrome (689262986).

The spelling of 557131231 in words is "five hundred fifty-seven million, one hundred thirty-one thousand, two hundred thirty-one".