2156322 has 16 divisors (see below), whose sum is σ = 4928832. Its totient is φ = 616080.

The previous prime is 2156317. The next prime is 2156339. The reversal of 2156322 is 2236512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25629 + ... + 25712.

It is an arithmetic number, because the mean of its divisors is an integer number (308052).

2^2156322 is an apocalyptic number.

2156322 is an abundant number, since it is smaller than the sum of its proper divisors (2772510).

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

2156322 is a wasteful number, since it uses less digits than its factorization.

2156322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51353.

The product of its digits is 720, while the sum is 21.

The square root of 2156322 is about 1468.4420315423. The cubic root of 2156322 is about 129.1926692477.

The spelling of 2156322 in words is "two million, one hundred fifty-six thousand, three hundred twenty-two".