225624978 has 12 divisors (see below), whose sum is σ = 488854158. Its totient is φ = 75208320.

The previous prime is 225624977. The next prime is 225624989. The reversal of 225624978 is 879426522.

225624978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 223293249 + 2331729 = 14943^2 + 1527^2 .

It is not an unprimeable number, because it can be changed into a prime (225624977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6267343 + ... + 6267378.

Almost surely, 2^225624978 is an apocalyptic number.

225624978 is an abundant number, since it is smaller than the sum of its proper divisors (263229180).

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

225624978 is a wasteful number, since it uses less digits than its factorization.

225624978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12534729 (or 12534726 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 225624978 is about 15020.8181534829. The cubic root of 225624978 is about 608.7828259744.

The spelling of 225624978 in words is "two hundred twenty-five million, six hundred twenty-four thousand, nine hundred seventy-eight".