225818656 has 72 divisors (see below), whose sum is σ = 523998720. Its totient is φ = 95501952.

The previous prime is 225818653. The next prime is 225818657. The reversal of 225818656 is 656818522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225818653) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 122961 + ... + 124783.

It is an arithmetic number, because the mean of its divisors is an integer number (7277760).

Almost surely, 2^225818656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225818656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261999360).

225818656 is an abundant number, since it is smaller than the sum of its proper divisors (298180064).

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

225818656 is a wasteful number, since it uses less digits than its factorization.

225818656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1911 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 225818656 is about 15027.2637562532. The cubic root of 225818656 is about 608.9569705803.

The spelling of 225818656 in words is "two hundred twenty-five million, eight hundred eighteen thousand, six hundred fifty-six".