222251904 has 128 divisors (see below), whose sum is σ = 749740800. Its totient is φ = 63493632.

The previous prime is 222251899. The next prime is 222251923. The reversal of 222251904 is 409152222.

It is a happy number.

222251904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19599 + ... + 28785.

It is an arithmetic number, because the mean of its divisors is an integer number (5857350).

Almost surely, 2^222251904 is an apocalyptic number.

222251904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222251904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374870400).

222251904 is an abundant number, since it is smaller than the sum of its proper divisors (527488896).

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

222251904 is an equidigital number, since it uses as much as digits as its factorization.

222251904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217 (or 9199 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 222251904 is about 14908.1153738492. The cubic root of 222251904 is about 605.7338307616.

The spelling of 222251904 in words is "two hundred twenty-two million, two hundred fifty-one thousand, nine hundred four".