255520025 has 12 divisors (see below), whose sum is σ = 317043324. Its totient is φ = 204288000.

The previous prime is 255519997. The next prime is 255520093. The reversal of 255520025 is 520025552.

It can be written as a sum of positive squares in 6 ways, for example, as 23658496 + 231861529 = 4864^2 + 15227^2 .

It is not a de Polignac number, because 255520025 - 2¹² = 255515929 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255519976 and 255520003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74345 + ... + 77705.

It is an arithmetic number, because the mean of its divisors is an integer number (26420277).

Almost surely, 2^255520025 is an apocalyptic number.

255520025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255520025 is a deficient number, since it is larger than the sum of its proper divisors (61523299).

255520025 is a wasteful number, since it uses less digits than its factorization.

255520025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412 (or 6407 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 255520025 is about 15984.9937441339. The cubic root of 255520025 is about 634.5633429293.

Adding to 255520025 its reverse (520025552), we get a palindrome (775545577).

The spelling of 255520025 in words is "two hundred fifty-five million, five hundred twenty thousand, twenty-five".