2191022222 has 4 divisors (see below), whose sum is σ = 3286533336. Its totient is φ = 1095511110.

The previous prime is 2191022209. The next prime is 2191022233. The reversal of 2191022222 is 2222201912.

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

2191022222 is a modest number, since divided by 22222 gives 21910 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547755554 + ... + 547755557.

It is an arithmetic number, because the mean of its divisors is an integer number (821633334).

Almost surely, 2^2191022222 is an apocalyptic number.

2191022222 is a deficient number, since it is larger than the sum of its proper divisors (1095511114).

2191022222 is a wasteful number, since it uses less digits than its factorization.

2191022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095511113.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2191022222 is about 46808.3563266219. The cubic root of 2191022222 is about 1298.8198801144.

The spelling of 2191022222 in words is "two billion, one hundred ninety-one million, twenty-two thousand, two hundred twenty-two".