225163820 has 36 divisors (see below), whose sum is σ = 550045440. Its totient is φ = 77198688.

The previous prime is 225163753. The next prime is 225163823. The reversal of 225163820 is 28361522.

It is not an unprimeable number, because it can be changed into a prime (225163823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113900 + ... + 115859.

It is an arithmetic number, because the mean of its divisors is an integer number (15279040).

Almost surely, 2^225163820 is an apocalyptic number.

225163820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225163820 is an abundant number, since it is smaller than the sum of its proper divisors (324881620).

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

225163820 is a wasteful number, since it uses less digits than its factorization.

225163820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229782 (or 229773 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 225163820 is about 15005.4596730657. The cubic root of 225163820 is about 608.3677765365.

The spelling of 225163820 in words is "two hundred twenty-five million, one hundred sixty-three thousand, eight hundred twenty".