557879521 has 2 divisors, whose sum is σ = 557879522. Its totient is φ = 557879520.

The previous prime is 557879507. The next prime is 557879533. The reversal of 557879521 is 125978755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501088225 + 56791296 = 22385^2 + 7536^2 .

It is a cyclic number.

It is not a de Polignac number, because 557879521 - 2⁹ = 557879009 is a prime.

It is a super-2 number, since 2×557879521² = 622459119902378882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557879591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278939760 + 278939761.

It is an arithmetic number, because the mean of its divisors is an integer number (278939761).

Almost surely, 2^557879521 is an apocalyptic number.

It is an amenable number.

557879521 is a deficient number, since it is larger than the sum of its proper divisors (1).

557879521 is an equidigital number, since it uses as much as digits as its factorization.

557879521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 49.

The square root of 557879521 is about 23619.4733429854. The cubic root of 557879521 is about 823.2153751288.

The spelling of 557879521 in words is "five hundred fifty-seven million, eight hundred seventy-nine thousand, five hundred twenty-one".