255251663 has 2 divisors, whose sum is σ = 255251664. Its totient is φ = 255251662.

The previous prime is 255251653. The next prime is 255251669. The reversal of 255251663 is 366152552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255251663 - 2⁶ = 255251599 is a prime.

It is a super-2 number, since 2×255251663² = 130306822928531138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255251669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127625831 + 127625832.

It is an arithmetic number, because the mean of its divisors is an integer number (127625832).

Almost surely, 2^255251663 is an apocalyptic number.

255251663 is a deficient number, since it is larger than the sum of its proper divisors (1).

255251663 is an equidigital number, since it uses as much as digits as its factorization.

255251663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 35.

The square root of 255251663 is about 15976.5973536295. The cubic root of 255251663 is about 634.3411133282.

The spelling of 255251663 in words is "two hundred fifty-five million, two hundred fifty-one thousand, six hundred sixty-three".