255205757 has 2 divisors, whose sum is σ = 255205758. Its totient is φ = 255205756.

The previous prime is 255205729. The next prime is 255205781. The reversal of 255205757 is 757502552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196392196 + 58813561 = 14014^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 255205757 - 2¹⁸ = 254943613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255205757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255205957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127602878 + 127602879.

It is an arithmetic number, because the mean of its divisors is an integer number (127602879).

Almost surely, 2^255205757 is an apocalyptic number.

It is an amenable number.

255205757 is a deficient number, since it is larger than the sum of its proper divisors (1).

255205757 is an equidigital number, since it uses as much as digits as its factorization.

255205757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122500, while the sum is 38.

The square root of 255205757 is about 15975.1606251706. The cubic root of 255205757 is about 634.3030831365.

The spelling of 255205757 in words is "two hundred fifty-five million, two hundred five thousand, seven hundred fifty-seven".