22665197 has 2 divisors, whose sum is σ = 22665198. Its totient is φ = 22665196.

The previous prime is 22665193. The next prime is 22665217. The reversal of 22665197 is 79156622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16370116 + 6295081 = 4046^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 22665197 - 2² = 22665193 is a prime.

It is a super-2 number, since 2×22665197² = 1027422310097618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22665197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22665191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332598 + 11332599.

It is an arithmetic number, because the mean of its divisors is an integer number (11332599).

Almost surely, 2^22665197 is an apocalyptic number.

It is an amenable number.

22665197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22665197 is an equidigital number, since it uses as much as digits as its factorization.

22665197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 22665197 is about 4760.7979373210. The cubic root of 22665197 is about 283.0000416204. Note that the first 4 decimals are identical.

The spelling of 22665197 in words is "twenty-two million, six hundred sixty-five thousand, one hundred ninety-seven".