255262561 has 2 divisors, whose sum is σ = 255262562. Its totient is φ = 255262560.

The previous prime is 255262543. The next prime is 255262571. The reversal of 255262561 is 165262552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154380625 + 100881936 = 12425^2 + 10044^2 .

It is a cyclic number.

It is not a de Polignac number, because 255262561 - 2⁵ = 255262529 is a prime.

It is not a weakly prime, because it can be changed into another prime (255262571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127631280 + 127631281.

It is an arithmetic number, because the mean of its divisors is an integer number (127631281).

Almost surely, 2^255262561 is an apocalyptic number.

It is an amenable number.

255262561 is a deficient number, since it is larger than the sum of its proper divisors (1).

255262561 is an equidigital number, since it uses as much as digits as its factorization.

255262561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

The square root of 255262561 is about 15976.9384113478. The cubic root of 255262561 is about 634.3501409560.

Subtracting from 255262561 its reverse (165262552), we obtain a palindrome (90000009).

The spelling of 255262561 in words is "two hundred fifty-five million, two hundred sixty-two thousand, five hundred sixty-one".