255631225 has 24 divisors (see below), whose sum is σ = 334943840. Its totient is φ = 193000320.

The previous prime is 255631219. The next prime is 255631231. The reversal of 255631225 is 522136552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (255631219) and next prime (255631231).

It is not a de Polignac number, because 255631225 - 2³ = 255631217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144949 + ... + 146701.

Almost surely, 2^255631225 is an apocalyptic number.

255631225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255631225 is a deficient number, since it is larger than the sum of its proper divisors (79312615).

255631225 is a wasteful number, since it uses less digits than its factorization.

255631225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2084 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 255631225 is about 15988.4716280200. The cubic root of 255631225 is about 634.6553816518.

Adding to 255631225 its reverse (522136552), we get a palindrome (777767777).

The spelling of 255631225 in words is "two hundred fifty-five million, six hundred thirty-one thousand, two hundred twenty-five".