22166538 has 16 divisors (see below), whose sum is σ = 46941120. Its totient is φ = 6954176.

The previous prime is 22166509. The next prime is 22166539. The reversal of 22166538 is 83566122.

It is a junction number, because it is equal to n+sod(n) for n = 22166499 and 22166508.

It is not an unprimeable number, because it can be changed into a prime (22166539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108558 + ... + 108761.

It is an arithmetic number, because the mean of its divisors is an integer number (2933820).

Almost surely, 2^22166538 is an apocalyptic number.

22166538 is an abundant number, since it is smaller than the sum of its proper divisors (24774582).

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

22166538 is a wasteful number, since it uses less digits than its factorization.

22166538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217341.

The product of its digits is 17280, while the sum is 33.

The square root of 22166538 is about 4708.1352996701. The cubic root of 22166538 is about 280.9091958895.

The spelling of 22166538 in words is "twenty-two million, one hundred sixty-six thousand, five hundred thirty-eight".