222500664 has 24 divisors (see below), whose sum is σ = 602606160. Its totient is φ = 74166864.

The previous prime is 222500653. The next prime is 222500687. The reversal of 222500664 is 466005222.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1545072 + ... + 1545215.

It is an arithmetic number, because the mean of its divisors is an integer number (25108590).

Almost surely, 2^222500664 is an apocalyptic number.

222500664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

222500664 is an abundant number, since it is smaller than the sum of its proper divisors (380105496).

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

222500664 is a wasteful number, since it uses less digits than its factorization.

222500664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090299 (or 3090292 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 222500664 is about 14916.4561474903. The cubic root of 222500664 is about 605.9597398342.

Adding to 222500664 its reverse (466005222), we get a palindrome (688505886).

The spelling of 222500664 in words is "two hundred twenty-two million, five hundred thousand, six hundred sixty-four".