225121864 has 16 divisors (see below), whose sum is σ = 460476720. Its totient is φ = 102328080.

The previous prime is 225121849. The next prime is 225121873. The reversal of 225121864 is 468121522.

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 3 ways as a sum of consecutive naturals, for example, 1279014 + ... + 1279189.

It is an arithmetic number, because the mean of its divisors is an integer number (28779795).

Almost surely, 2^225121864 is an apocalyptic number.

It is an amenable number.

225121864 is an abundant number, since it is smaller than the sum of its proper divisors (235354856).

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

225121864 is a wasteful number, since it uses less digits than its factorization.

225121864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558220 (or 2558216 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 225121864 is about 15004.0615834513. The cubic root of 225121864 is about 608.3299873630.

The spelling of 225121864 in words is "two hundred twenty-five million, one hundred twenty-one thousand, eight hundred sixty-four".