22197874 has 4 divisors (see below), whose sum is σ = 33296814. Its totient is φ = 11098936.

The previous prime is 22197863. The next prime is 22197887. The reversal of 22197874 is 47879122.

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., 22155849 + 42025 = 4707^2 + 205^2 .

It is a super-2 number, since 2×22197874² = 985491220239752, which contains 22 as substring.

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 an unprimeable number.

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, 5549467 + ... + 5549470.

Almost surely, 2^22197874 is an apocalyptic number.

22197874 is a deficient number, since it is larger than the sum of its proper divisors (11098940).

22197874 is a wasteful number, since it uses less digits than its factorization.

22197874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11098939.

The product of its digits is 56448, while the sum is 40.

The square root of 22197874 is about 4711.4619811689. The cubic root of 22197874 is about 281.0415038133.

The spelling of 22197874 in words is "twenty-two million, one hundred ninety-seven thousand, eight hundred seventy-four".