2156122222 has 8 divisors (see below), whose sum is σ = 3238457976. Its totient is φ = 1076636232.

The previous prime is 2156122219. The next prime is 2156122229. The reversal of 2156122222 is 2222216512.

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 (2156122229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710548 + ... + 713575.

It is an arithmetic number, because the mean of its divisors is an integer number (404807247).

Almost surely, 2^2156122222 is an apocalyptic number.

2156122222 is a deficient number, since it is larger than the sum of its proper divisors (1082335754).

2156122222 is a wasteful number, since it uses less digits than its factorization.

2156122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424882.

The product of its digits is 1920, while the sum is 25.

The square root of 2156122222 is about 46434.0631648793. The cubic root of 2156122222 is about 1291.8867932869.

Adding to 2156122222 its reverse (2222216512), we get a palindrome (4378338734).

The spelling of 2156122222 in words is "two billion, one hundred fifty-six million, one hundred twenty-two thousand, two hundred twenty-two".