2166422 has 4 divisors (see below), whose sum is σ = 3249636. Its totient is φ = 1083210.

The previous prime is 2166419. The next prime is 2166427. The reversal of 2166422 is 2246612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541604 + ... + 541607.

It is an arithmetic number, because the mean of its divisors is an integer number (812409).

2^2166422 is an apocalyptic number.

2166422 is a deficient number, since it is larger than the sum of its proper divisors (1083214).

2166422 is a wasteful number, since it uses less digits than its factorization.

2166422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083213.

The product of its digits is 1152, while the sum is 23.

The square root of 2166422 is about 1471.8770329073. The cubic root of 2166422 is about 129.3940637190.

The spelling of 2166422 in words is "two million, one hundred sixty-six thousand, four hundred twenty-two".