255763121 has 2 divisors, whose sum is σ = 255763122. Its totient is φ = 255763120.

The previous prime is 255763103. The next prime is 255763133. The reversal of 255763121 is 121367552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170015521 + 85747600 = 13039^2 + 9260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255763121 is a prime.

It is not a weakly prime, because it can be changed into another prime (255763621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127881560 + 127881561.

It is an arithmetic number, because the mean of its divisors is an integer number (127881561).

Almost surely, 2^255763121 is an apocalyptic number.

It is an amenable number.

255763121 is a deficient number, since it is larger than the sum of its proper divisors (1).

255763121 is an equidigital number, since it uses as much as digits as its factorization.

255763121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 255763121 is about 15992.5958180653. The cubic root of 255763121 is about 634.7645155726.

The spelling of 255763121 in words is "two hundred fifty-five million, seven hundred sixty-three thousand, one hundred twenty-one".