225621078 has 16 divisors (see below), whose sum is σ = 451421040. Its totient is φ = 75177216.

The previous prime is 225621041. The next prime is 225621091. The reversal of 225621078 is 870126522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13458 + ... + 25146.

It is an arithmetic number, because the mean of its divisors is an integer number (28213815).

Almost surely, 2^225621078 is an apocalyptic number.

225621078 is an abundant number, since it is smaller than the sum of its proper divisors (225799962).

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

225621078 is a wasteful number, since it uses less digits than its factorization.

225621078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14911.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 225621078 is about 15020.6883330958. The cubic root of 225621078 is about 608.7793182855.

The spelling of 225621078 in words is "two hundred twenty-five million, six hundred twenty-one thousand, seventy-eight".