22198522 has 4 divisors (see below), whose sum is σ = 33297786. Its totient is φ = 11099260.

The previous prime is 22198513. The next prime is 22198591. The reversal of 22198522 is 22589122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22589122 = 2 ⋅11294561.

It can be written as a sum of positive squares in only one way, i.e., 18584721 + 3613801 = 4311^2 + 1901^2 .

It is a Smith number, since the sum of its digits (31) 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 polite number, since it can be written as a sum of consecutive naturals, namely, 5549629 + ... + 5549632.

Almost surely, 2^22198522 is an apocalyptic number.

22198522 is a deficient number, since it is larger than the sum of its proper divisors (11099264).

22198522 is a wasteful number, since it uses less digits than its factorization.

22198522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11099263.

The product of its digits is 5760, while the sum is 31.

The square root of 22198522 is about 4711.5307491303. The cubic root of 22198522 is about 281.0442385065.

The spelling of 22198522 in words is "twenty-two million, one hundred ninety-eight thousand, five hundred twenty-two".