557018257 has 2 divisors, whose sum is σ = 557018258. Its totient is φ = 557018256.

The previous prime is 557018237. The next prime is 557018263. The reversal of 557018257 is 752810755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539679361 + 17338896 = 23231^2 + 4164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557018257 is a prime.

It is not a weakly prime, because it can be changed into another prime (557018207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278509128 + 278509129.

It is an arithmetic number, because the mean of its divisors is an integer number (278509129).

Almost surely, 2^557018257 is an apocalyptic number.

It is an amenable number.

557018257 is a deficient number, since it is larger than the sum of its proper divisors (1).

557018257 is an equidigital number, since it uses as much as digits as its factorization.

557018257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 557018257 is about 23601.2342262010. The cubic root of 557018257 is about 822.7915255867.

The spelling of 557018257 in words is "five hundred fifty-seven million, eighteen thousand, two hundred fifty-seven".