225531250 has 56 divisors (see below), whose sum is σ = 483743808. Its totient is φ = 77250000.

The previous prime is 225531233. The next prime is 225531263. The reversal of 225531250 is 52135522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 218235 + ... + 219265.

Almost surely, 2^225531250 is an apocalyptic number.

225531250 is an abundant number, since it is smaller than the sum of its proper divisors (258212558).

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

225531250 is an frugal number, since it uses more digits than its factorization.

225531250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 225531250 is about 15017.6978928197. The cubic root of 225531250 is about 608.6985151263.

Adding to 225531250 its reverse (52135522), we get a palindrome (277666772).

The spelling of 225531250 in words is "two hundred twenty-five million, five hundred thirty-one thousand, two hundred fifty".