255520757 has 2 divisors, whose sum is σ = 255520758. Its totient is φ = 255520756.

The previous prime is 255520753. The next prime is 255520801. The reversal of 255520757 is 757025552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191296561 + 64224196 = 13831^2 + 8014^2 .

It is a cyclic number.

It is not a de Polignac number, because 255520757 - 2² = 255520753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255520757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255520753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127760378 + 127760379.

It is an arithmetic number, because the mean of its divisors is an integer number (127760379).

Almost surely, 2^255520757 is an apocalyptic number.

It is an amenable number.

255520757 is a deficient number, since it is larger than the sum of its proper divisors (1).

255520757 is an equidigital number, since it uses as much as digits as its factorization.

255520757 is an odious number, because the sum of its binary digits is odd.

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

The square root of 255520757 is about 15985.0166405919. The cubic root of 255520757 is about 634.5639488831.

The spelling of 255520757 in words is "two hundred fifty-five million, five hundred twenty thousand, seven hundred fifty-seven".