22021197 has 8 divisors (see below), whose sum is σ = 32030880. Its totient is φ = 13346160.

The previous prime is 22021177. The next prime is 22021211. The reversal of 22021197 is 79112022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22021197 - 2⁸ = 22020941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021177) 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, 333622 + ... + 333687.

It is an arithmetic number, because the mean of its divisors is an integer number (4003860).

Almost surely, 2^22021197 is an apocalyptic number.

It is an amenable number.

22021197 is a deficient number, since it is larger than the sum of its proper divisors (10009683).

22021197 is a wasteful number, since it uses less digits than its factorization.

22021197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667323.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 22021197 is about 4692.6748235947. The cubic root of 22021197 is about 280.2938963417.

The spelling of 22021197 in words is "twenty-two million, twenty-one thousand, one hundred ninety-seven".