2156922 has 32 divisors (see below), whose sum is σ = 4881600. Its totient is φ = 705744.

The previous prime is 2156897. The next prime is 2156939. The reversal of 2156922 is 2296512.

2156922 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2848 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (152550).

2^2156922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440800).

2156922 is an abundant number, since it is smaller than the sum of its proper divisors (2724678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156922 is a wasteful number, since it uses less digits than its factorization.

2156922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 741 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2156922 is about 1468.6463154892. The cubic root of 2156922 is about 129.2046508245.

The spelling of 2156922 in words is "two million, one hundred fifty-six thousand, nine hundred twenty-two".