225631255 has 16 divisors (see below), whose sum is σ = 280433664. Its totient is φ = 174163360.

The previous prime is 225631249. The next prime is 225631309. The reversal of 225631255 is 552136522.

225631255 = 2168² + 2169² + ... + 2214².

It is a happy number.

It is not a de Polignac number, because 225631255 - 2¹¹ = 225629207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9924 + ... + 23446.

It is an arithmetic number, because the mean of its divisors is an integer number (17527104).

Almost surely, 2^225631255 is an apocalyptic number.

225631255 is a deficient number, since it is larger than the sum of its proper divisors (54802409).

225631255 is a wasteful number, since it uses less digits than its factorization.

225631255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13646.

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

The square root of 225631255 is about 15021.0270953753. The cubic root of 225631255 is about 608.7884714698.

Adding to 225631255 its reverse (552136522), we get a palindrome (777767777).

The spelling of 225631255 in words is "two hundred twenty-five million, six hundred thirty-one thousand, two hundred fifty-five".