225631072 has 24 divisors (see below), whose sum is σ = 470342376. Its totient is φ = 106179072.

The previous prime is 225631039. The next prime is 225631073. The reversal of 225631072 is 270136522.

225631072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 225631072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225631073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206838 + ... + 207925.

It is an arithmetic number, because the mean of its divisors is an integer number (19597599).

Almost surely, 2^225631072 is an apocalyptic number.

It is an amenable number.

225631072 is an abundant number, since it is smaller than the sum of its proper divisors (244711304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225631072 is a wasteful number, since it uses less digits than its factorization.

225631072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414790 (or 414782 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 225631072 is about 15021.0210039131. The cubic root of 225631072 is about 608.7883068822.

Adding to 225631072 its reverse (270136522), we get a palindrome (495767594).

The spelling of 225631072 in words is "two hundred twenty-five million, six hundred thirty-one thousand, seventy-two".