557258161 has 2 divisors, whose sum is σ = 557258162. Its totient is φ = 557258160.

The previous prime is 557258131. The next prime is 557258167. The reversal of 557258161 is 161852755.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299463025 + 257795136 = 17305^2 + 16056^2 .

It is a cyclic number.

It is not a de Polignac number, because 557258161 - 2¹¹ = 557256113 is a prime.

It is a super-2 number, since 2×557258161² = 621073316002203842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557258167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278629080 + 278629081.

It is an arithmetic number, because the mean of its divisors is an integer number (278629081).

Almost surely, 2^557258161 is an apocalyptic number.

It is an amenable number.

557258161 is a deficient number, since it is larger than the sum of its proper divisors (1).

557258161 is an equidigital number, since it uses as much as digits as its factorization.

557258161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 40.

The square root of 557258161 is about 23606.3161251391. The cubic root of 557258161 is about 822.9096322162.

The spelling of 557258161 in words is "five hundred fifty-seven million, two hundred fifty-eight thousand, one hundred sixty-one".