255217825 has 18 divisors (see below), whose sum is σ = 324430562. Its totient is φ = 199161600.

The previous prime is 255217819. The next prime is 255217877. The reversal of 255217825 is 528712552.

It can be written as a sum of positive squares in 9 ways, for example, as 146724769 + 108493056 = 12113^2 + 10416^2 .

It is not a de Polignac number, because 255217825 - 2¹⁷ = 255086753 is a prime.

It is a super-2 number, since 2×255217825² = 130272276395461250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38989 + ... + 45061.

Almost surely, 2^255217825 is an apocalyptic number.

255217825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255217825 is a deficient number, since it is larger than the sum of its proper divisors (69212737).

255217825 is an equidigital number, since it uses as much as digits as its factorization.

255217825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165 (or 6119 counting only the distinct ones).

The product of its digits is 56000, while the sum is 37.

The square root of 255217825 is about 15975.5383320876. The cubic root of 255217825 is about 634.3130811462.

The spelling of 255217825 in words is "two hundred fifty-five million, two hundred seventeen thousand, eight hundred twenty-five".