225161250 has 80 divisors (see below), whose sum is σ = 569442720. Its totient is φ = 59328000.

The previous prime is 225161213. The next prime is 225161263. The reversal of 225161250 is 52161522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 225161250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 363441 + ... + 364059.

It is an arithmetic number, because the mean of its divisors is an integer number (7118034).

Almost surely, 2^225161250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225161250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284721360).

225161250 is an abundant number, since it is smaller than the sum of its proper divisors (344281470).

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

225161250 is an equidigital number, since it uses as much as digits as its factorization.

225161250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 225161250 is about 15005.3740373241. The cubic root of 225161250 is about 608.3654619090.

The spelling of 225161250 in words is "two hundred twenty-five million, one hundred sixty-one thousand, two hundred fifty".