557845261 has 2 divisors, whose sum is σ = 557845262. Its totient is φ = 557845260.

The previous prime is 557845237. The next prime is 557845273. The reversal of 557845261 is 162548755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495908361 + 61936900 = 22269^2 + 7870^2 .

It is a cyclic number.

It is not a de Polignac number, because 557845261 - 2⁷ = 557845133 is a prime.

It is a super-2 number, since 2×557845261² = 622382670440316242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557845201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278922630 + 278922631.

It is an arithmetic number, because the mean of its divisors is an integer number (278922631).

Almost surely, 2^557845261 is an apocalyptic number.

It is an amenable number.

557845261 is a deficient number, since it is larger than the sum of its proper divisors (1).

557845261 is an equidigital number, since it uses as much as digits as its factorization.

557845261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 43.

The square root of 557845261 is about 23618.7480828261. The cubic root of 557845261 is about 823.1985232608.

The spelling of 557845261 in words is "five hundred fifty-seven million, eight hundred forty-five thousand, two hundred sixty-one".