22742197 has 2 divisors, whose sum is σ = 22742198. Its totient is φ = 22742196.

The previous prime is 22742191. The next prime is 22742273. The reversal of 22742197 is 79124722.

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., 22667121 + 75076 = 4761^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 22742197 - 2¹¹ = 22740149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22742191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11371098 + 11371099.

It is an arithmetic number, because the mean of its divisors is an integer number (11371099).

Almost surely, 2^22742197 is an apocalyptic number.

It is an amenable number.

22742197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22742197 is an equidigital number, since it uses as much as digits as its factorization.

22742197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 22742197 is about 4768.8779602754. The cubic root of 22742197 is about 283.3201560961.

It can be divided in two parts, 227 and 42197, that added together give a palindrome (42424).

The spelling of 22742197 in words is "twenty-two million, seven hundred forty-two thousand, one hundred ninety-seven".