255563081 has 2 divisors, whose sum is σ = 255563082. Its totient is φ = 255563080.

The previous prime is 255563003. The next prime is 255563093. The reversal of 255563081 is 180365552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 84345856 = 13085^2 + 9184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255563081 is a prime.

It is a super-2 number, since 2×255563081² = 130624976740425122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255563381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127781540 + 127781541.

It is an arithmetic number, because the mean of its divisors is an integer number (127781541).

Almost surely, 2^255563081 is an apocalyptic number.

It is an amenable number.

255563081 is a deficient number, since it is larger than the sum of its proper divisors (1).

255563081 is an equidigital number, since it uses as much as digits as its factorization.

255563081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 255563081 is about 15986.3404505221. The cubic root of 255563081 is about 634.5989829603.

The spelling of 255563081 in words is "two hundred fifty-five million, five hundred sixty-three thousand, eighty-one".