255565957 has 2 divisors, whose sum is σ = 255565958. Its totient is φ = 255565956.

The previous prime is 255565927. The next prime is 255565963. The reversal of 255565957 is 759565552.

255565957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201895681 + 53670276 = 14209^2 + 7326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255565957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255565957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255565927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127782978 + 127782979.

It is an arithmetic number, because the mean of its divisors is an integer number (127782979).

Almost surely, 2^255565957 is an apocalyptic number.

It is an amenable number.

255565957 is a deficient number, since it is larger than the sum of its proper divisors (1).

255565957 is an equidigital number, since it uses as much as digits as its factorization.

255565957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2362500, while the sum is 49.

The square root of 255565957 is about 15986.4304020629. The cubic root of 255565957 is about 634.6013634552.

It can be divided in two parts, 25556 and 5957, that added together give a palindrome (31513).

The spelling of 255565957 in words is "two hundred fifty-five million, five hundred sixty-five thousand, nine hundred fifty-seven".