2191922 has 4 divisors (see below), whose sum is σ = 3287886. Its totient is φ = 1095960.

The previous prime is 2191883. The next prime is 2191949. The reversal of 2191922 is 2291912.

It is a happy number.

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., 1585081 + 606841 = 1259^2 + 779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2191891 and 2191900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547979 + ... + 547982.

2^2191922 is an apocalyptic number.

2191922 is a deficient number, since it is larger than the sum of its proper divisors (1095964).

2191922 is a wasteful number, since it uses less digits than its factorization.

2191922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095963.

The product of its digits is 648, while the sum is 26.

The square root of 2191922 is about 1480.5140998991. The cubic root of 2191922 is about 129.8997649438.

It can be divided in two parts, 2191 and 922, that added together give a palindrome (3113).

The spelling of 2191922 in words is "two million, one hundred ninety-one thousand, nine hundred twenty-two".