204051222 has 48 divisors (see below), whose sum is σ = 473057520. Its totient is φ = 63374400.

The previous prime is 204051181. The next prime is 204051223. The reversal of 204051222 is 222150402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204051195 and 204051204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204051223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15972 + ... + 25752.

It is an arithmetic number, because the mean of its divisors is an integer number (9855365).

Almost surely, 2^204051222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204051222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236528760).

204051222 is an abundant number, since it is smaller than the sum of its proper divisors (269006298).

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

204051222 is a wasteful number, since it uses less digits than its factorization.

204051222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869 (or 9866 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 204051222 is about 14284.6498732031. The cubic root of 204051222 is about 588.7257974824.

The spelling of 204051222 in words is "two hundred four million, fifty-one thousand, two hundred twenty-two".