222221500 has 24 divisors (see below), whose sum is σ = 485332848. Its totient is φ = 88888400.

The previous prime is 222221497. The next prime is 222221537. The reversal of 222221500 is 5122222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221722 + ... + 222721.

It is an arithmetic number, because the mean of its divisors is an integer number (20222202).

Almost surely, 2^222221500 is an apocalyptic number.

222221500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221500 is an abundant number, since it is smaller than the sum of its proper divisors (263111348).

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

222221500 is a wasteful number, since it uses less digits than its factorization.

222221500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444462 (or 444450 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 222221500 is about 14907.0956259092. The cubic root of 222221500 is about 605.7062080942.

Adding to 222221500 its reverse (5122222), we get a palindrome (227343722).

The spelling of 222221500 in words is "two hundred twenty-two million, two hundred twenty-one thousand, five hundred".