921872222 has 8 divisors (see below), whose sum is σ = 1382959656. Its totient is φ = 460885672.

The previous prime is 921872221. The next prime is 921872257. The reversal of 921872222 is 222278129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921872221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4748 + ... + 43200.

It is an arithmetic number, because the mean of its divisors is an integer number (172869957).

Almost surely, 2^921872222 is an apocalyptic number.

921872222 is a deficient number, since it is larger than the sum of its proper divisors (461087434).

921872222 is a wasteful number, since it uses less digits than its factorization.

921872222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50442.

The product of its digits is 16128, while the sum is 35.

The square root of 921872222 is about 30362.3487563133. The cubic root of 921872222 is about 973.2481263634.

The spelling of 921872222 in words is "nine hundred twenty-one million, eight hundred seventy-two thousand, two hundred twenty-two".