225402220 has 24 divisors (see below), whose sum is σ = 474377904. Its totient is φ = 89964096.

The previous prime is 225402179. The next prime is 225402223. The reversal of 225402220 is 22204522.

It is not an unprimeable number, because it can be changed into a prime (225402223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727 + ... + 21406.

It is an arithmetic number, because the mean of its divisors is an integer number (19765746).

Almost surely, 2^225402220 is an apocalyptic number.

225402220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225402220 is an abundant number, since it is smaller than the sum of its proper divisors (248975684).

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

225402220 is a wasteful number, since it uses less digits than its factorization.

225402220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24609 (or 24607 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 225402220 is about 15013.4013467968. The cubic root of 225402220 is about 608.5824109615.

Adding to 225402220 its reverse (22204522), we get a palindrome (247606742).

The spelling of 225402220 in words is "two hundred twenty-five million, four hundred two thousand, two hundred twenty".