22222997 has 2 divisors, whose sum is σ = 22222998. Its totient is φ = 22222996.

The previous prime is 22222987. The next prime is 22223011. The reversal of 22222997 is 79922222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17859076 + 4363921 = 4226^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222997 - 2¹⁰ = 22221973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22222957) 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, 11111498 + 11111499.

It is an arithmetic number, because the mean of its divisors is an integer number (11111499).

Almost surely, 2^22222997 is an apocalyptic number.

It is an amenable number.

22222997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222997 is an equidigital number, since it uses as much as digits as its factorization.

22222997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 22222997 is about 4714.1273847871. The cubic root of 22222997 is about 281.1474890937.

The spelling of 22222997 in words is "twenty-two million, two hundred twenty-two thousand, nine hundred ninety-seven".