22199746 has 4 divisors (see below), whose sum is σ = 33299622. Its totient is φ = 11099872.

The previous prime is 22199743. The next prime is 22199747. The reversal of 22199746 is 64799122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64799122 = 2 ⋅32399561.

It can be written as a sum of positive squares in only one way, i.e., 13432225 + 8767521 = 3665^2 + 2961^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 22199699 and 22199708.

It is not an unprimeable number, because it can be changed into a prime (22199743) 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 as a sum of consecutive naturals, namely, 5549935 + ... + 5549938.

Almost surely, 2^22199746 is an apocalyptic number.

22199746 is a deficient number, since it is larger than the sum of its proper divisors (11099876).

22199746 is a wasteful number, since it uses less digits than its factorization.

22199746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099875.

The product of its digits is 54432, while the sum is 40.

The square root of 22199746 is about 4711.6606414299. The cubic root of 22199746 is about 281.0494038928.

The spelling of 22199746 in words is "twenty-two million, one hundred ninety-nine thousand, seven hundred forty-six".