199972222 has 4 divisors (see below), whose sum is σ = 299958336. Its totient is φ = 99986110.

The previous prime is 199972217. The next prime is 199972237. The reversal of 199972222 is 222279991.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 49993054 + ... + 49993057.

It is an arithmetic number, because the mean of its divisors is an integer number (74989584).

Almost surely, 2^199972222 is an apocalyptic number.

199972222 is a deficient number, since it is larger than the sum of its proper divisors (99986114).

199972222 is an equidigital number, since it uses as much as digits as its factorization.

199972222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99986113.

The product of its digits is 81648, while the sum is 43.

The square root of 199972222 is about 14141.1534890192. The cubic root of 199972222 is about 584.7764719341.

The spelling of 199972222 in words is "one hundred ninety-nine million, nine hundred seventy-two thousand, two hundred twenty-two".