255681953 has 2 divisors, whose sum is σ = 255681954. Its totient is φ = 255681952.

The previous prime is 255681871. The next prime is 255681967. The reversal of 255681953 is 359186552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254498209 + 1183744 = 15953^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 255681953 - 2¹⁴ = 255665569 is a prime.

It is a super-2 number, since 2×255681953² = 130746522179788418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255681973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127840976 + 127840977.

It is an arithmetic number, because the mean of its divisors is an integer number (127840977).

Almost surely, 2^255681953 is an apocalyptic number.

It is an amenable number.

255681953 is a deficient number, since it is larger than the sum of its proper divisors (1).

255681953 is an equidigital number, since it uses as much as digits as its factorization.

255681953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 44.

The square root of 255681953 is about 15990.0579423591. The cubic root of 255681953 is about 634.6973596599.

The spelling of 255681953 in words is "two hundred fifty-five million, six hundred eighty-one thousand, nine hundred fifty-three".