22297861 has 2 divisors, whose sum is σ = 22297862. Its totient is φ = 22297860.

The previous prime is 22297859. The next prime is 22297883. The reversal of 22297861 is 16879222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22268961 + 28900 = 4719^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 22297861 - 2¹ = 22297859 is a prime.

Together with 22297859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22297861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22297831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11148930 + 11148931.

It is an arithmetic number, because the mean of its divisors is an integer number (11148931).

Almost surely, 2^22297861 is an apocalyptic number.

It is an amenable number.

22297861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22297861 is an equidigital number, since it uses as much as digits as its factorization.

22297861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 22297861 is about 4722.0610965975. The cubic root of 22297861 is about 281.4628416197.

The spelling of 22297861 in words is "twenty-two million, two hundred ninety-seven thousand, eight hundred sixty-one".