22166947 has 4 divisors (see below), whose sum is σ = 24182136. Its totient is φ = 20151760.

The previous prime is 22166941. The next prime is 22166983. The reversal of 22166947 is 74966122.

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

It is a cyclic number.

It is not a de Polignac number, because 22166947 - 2⁷ = 22166819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22166941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007578 + ... + 1007599.

It is an arithmetic number, because the mean of its divisors is an integer number (6045534).

Almost surely, 2^22166947 is an apocalyptic number.

22166947 is a deficient number, since it is larger than the sum of its proper divisors (2015189).

22166947 is a wasteful number, since it uses less digits than its factorization.

22166947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015188.

The product of its digits is 36288, while the sum is 37.

The square root of 22166947 is about 4708.1787349250. The cubic root of 22166947 is about 280.9109235860.

The spelling of 22166947 in words is "twenty-two million, one hundred sixty-six thousand, nine hundred forty-seven".