225771018 has 16 divisors (see below), whose sum is σ = 492591456. Its totient is φ = 68415440.

The previous prime is 225771001. The next prime is 225771023. The reversal of 225771018 is 810177522.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 225771018.

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, 1710321 + ... + 1710452.

It is an arithmetic number, because the mean of its divisors is an integer number (30786966).

Almost surely, 2^225771018 is an apocalyptic number.

225771018 is an abundant number, since it is smaller than the sum of its proper divisors (266820438).

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

225771018 is a wasteful number, since it uses less digits than its factorization.

225771018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420789.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 225771018 is about 15025.6786202820. The cubic root of 225771018 is about 608.9141463471.

The spelling of 225771018 in words is "two hundred twenty-five million, seven hundred seventy-one thousand, eighteen".