557417261 has 2 divisors, whose sum is σ = 557417262. Its totient is φ = 557417260.

The previous prime is 557417219. The next prime is 557417279. The reversal of 557417261 is 162714755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554838025 + 2579236 = 23555^2 + 1606^2 .

It is a cyclic number.

It is not a de Polignac number, because 557417261 - 2²⁶ = 490308397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557417761) 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, 278708630 + 278708631.

It is an arithmetic number, because the mean of its divisors is an integer number (278708631).

Almost surely, 2^557417261 is an apocalyptic number.

It is an amenable number.

557417261 is a deficient number, since it is larger than the sum of its proper divisors (1).

557417261 is an equidigital number, since it uses as much as digits as its factorization.

557417261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 38.

The square root of 557417261 is about 23609.6857454732. The cubic root of 557417261 is about 822.9879397067.

The spelling of 557417261 in words is "five hundred fifty-seven million, four hundred seventeen thousand, two hundred sixty-one".