2156845222 has 8 divisors (see below), whose sum is σ = 3697448976. Its totient is φ = 924362232.

The previous prime is 2156845189. The next prime is 2156845279. The reversal of 2156845222 is 2225486512.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77030173 + ... + 77030200.

It is an arithmetic number, because the mean of its divisors is an integer number (462181122).

Almost surely, 2^2156845222 is an apocalyptic number.

2156845222 is a deficient number, since it is larger than the sum of its proper divisors (1540603754).

2156845222 is a wasteful number, since it uses less digits than its factorization.

2156845222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154060382.

The product of its digits is 76800, while the sum is 37.

The square root of 2156845222 is about 46441.8477453256. The cubic root of 2156845222 is about 1292.0311774595.

The spelling of 2156845222 in words is "two billion, one hundred fifty-six million, eight hundred forty-five thousand, two hundred twenty-two".