22019197 has 2 divisors, whose sum is σ = 22019198. Its totient is φ = 22019196.

The previous prime is 22019191. The next prime is 22019203. The reversal of 22019197 is 79191022.

It is a balanced prime because it is at equal distance from previous prime (22019191) and next prime (22019203).

It can be written as a sum of positive squares in only one way, i.e., 18757561 + 3261636 = 4331^2 + 1806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22019197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22019191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009598 + 11009599.

It is an arithmetic number, because the mean of its divisors is an integer number (11009599).

Almost surely, 2^22019197 is an apocalyptic number.

It is an amenable number.

22019197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22019197 is an equidigital number, since it uses as much as digits as its factorization.

22019197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 22019197 is about 4692.4617206750. The cubic root of 22019197 is about 280.2854105062.

The spelling of 22019197 in words is "twenty-two million, nineteen thousand, one hundred ninety-seven".