255797569 has 2 divisors, whose sum is σ = 255797570. Its totient is φ = 255797568.

The previous prime is 255797537. The next prime is 255797573. The reversal of 255797569 is 965797552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177209344 + 78588225 = 13312^2 + 8865^2 .

It is a cyclic number.

It is not a de Polignac number, because 255797569 - 2⁵ = 255797537 is a prime.

It is a super-2 number, since 2×255797569² = 130864792612619522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255797519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127898784 + 127898785.

It is an arithmetic number, because the mean of its divisors is an integer number (127898785).

Almost surely, 2^255797569 is an apocalyptic number.

It is an amenable number.

255797569 is a deficient number, since it is larger than the sum of its proper divisors (1).

255797569 is an equidigital number, since it uses as much as digits as its factorization.

255797569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5953500, while the sum is 55.

The square root of 255797569 is about 15993.6727801965. The cubic root of 255797569 is about 634.7930124962.

The spelling of 255797569 in words is "two hundred fifty-five million, seven hundred ninety-seven thousand, five hundred sixty-nine".