225197220 has 24 divisors (see below), whose sum is σ = 630552384. Its totient is φ = 60052576.

The previous prime is 225197191. The next prime is 225197239. The reversal of 225197220 is 22791522.

225197220 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876584 + ... + 1876703.

It is an arithmetic number, because the mean of its divisors is an integer number (26273016).

Almost surely, 2^225197220 is an apocalyptic number.

225197220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225197220 is an abundant number, since it is smaller than the sum of its proper divisors (405355164).

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

225197220 is a wasteful number, since it uses less digits than its factorization.

225197220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753299 (or 3753297 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 225197220 is about 15006.5725600485. The cubic root of 225197220 is about 608.3978560865.

The spelling of 225197220 in words is "two hundred twenty-five million, one hundred ninety-seven thousand, two hundred twenty".