222173812 has 12 divisors (see below), whose sum is σ = 444347680. Its totient is φ = 95217336.

The previous prime is 222173801. The next prime is 222173851. The reversal of 222173812 is 218371222.

222173812 is an admirable number.

It is a super-2 number, since 2×222173812² = 98722405477222688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 7934779 = 222173812 / (2 + 2 + 2 + 1 + 7 + 3 + 8 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3967362 + ... + 3967417.

Almost surely, 2^222173812 is an apocalyptic number.

It is an amenable number.

222173812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

222173812 is a wasteful number, since it uses less digits than its factorization.

222173812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934790 (or 7934788 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 222173812 is about 14905.4960333429. The cubic root of 222173812 is about 605.6628774773.

The spelling of 222173812 in words is "two hundred twenty-two million, one hundred seventy-three thousand, eight hundred twelve".