225855816 has 16 divisors (see below), whose sum is σ = 564639600. Its totient is φ = 75285264.

The previous prime is 225855809. The next prime is 225855841. The reversal of 225855816 is 618558522.

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, 4705306 + ... + 4705353.

It is an arithmetic number, because the mean of its divisors is an integer number (35289975).

Almost surely, 2^225855816 is an apocalyptic number.

It is an amenable number.

225855816 is an abundant number, since it is smaller than the sum of its proper divisors (338783784).

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

225855816 is a wasteful number, since it uses less digits than its factorization.

225855816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9410668 (or 9410664 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 225855816 is about 15028.5001247629. The cubic root of 225855816 is about 608.9903714225.

The spelling of 225855816 in words is "two hundred twenty-five million, eight hundred fifty-five thousand, eight hundred sixteen".