255238957 has 2 divisors, whose sum is σ = 255238958. Its totient is φ = 255238956.

The previous prime is 255238943. The next prime is 255238961. The reversal of 255238957 is 759832552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184443561 + 70795396 = 13581^2 + 8414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255238957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255238157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127619478 + 127619479.

It is an arithmetic number, because the mean of its divisors is an integer number (127619479).

Almost surely, 2^255238957 is an apocalyptic number.

It is an amenable number.

255238957 is a deficient number, since it is larger than the sum of its proper divisors (1).

255238957 is an equidigital number, since it uses as much as digits as its factorization.

255238957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 46.

The square root of 255238957 is about 15976.1997045605. The cubic root of 255238957 is about 634.3305876744.

The spelling of 255238957 in words is "two hundred fifty-five million, two hundred thirty-eight thousand, nine hundred fifty-seven".