2158922 has 4 divisors (see below), whose sum is σ = 3238386. Its totient is φ = 1079460.

The previous prime is 2158921. The next prime is 2158931. The reversal of 2158922 is 2298512.

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

It can be written as a sum of positive squares in only one way, i.e., 2157961 + 961 = 1469^2 + 31^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2158921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539729 + ... + 539732.

2^2158922 is an apocalyptic number.

2158922 is a deficient number, since it is larger than the sum of its proper divisors (1079464).

2158922 is a wasteful number, since it uses less digits than its factorization.

2158922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079463.

The product of its digits is 2880, while the sum is 29.

The square root of 2158922 is about 1469.3270568529. The cubic root of 2158922 is about 129.2445733735.

The spelling of 2158922 in words is "two million, one hundred fifty-eight thousand, nine hundred twenty-two".