225438216 has 32 divisors (see below), whose sum is σ = 565128960. Its totient is φ = 74941632.

The previous prime is 225438197. The next prime is 225438221. The reversal of 225438216 is 612834522.

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, 3640 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (17660280).

Almost surely, 2^225438216 is an apocalyptic number.

It is an amenable number.

225438216 is an abundant number, since it is smaller than the sum of its proper divisors (339690744).

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

225438216 is a wasteful number, since it uses less digits than its factorization.

225438216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25565 (or 25561 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 225438216 is about 15014.6000945746. The cubic root of 225438216 is about 608.6148054464.

It can be divided in two parts, 2254 and 38216, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 225438216 in words is "two hundred twenty-five million, four hundred thirty-eight thousand, two hundred sixteen".