22212997 has 2 divisors, whose sum is σ = 22212998. Its totient is φ = 22212996.

The previous prime is 22212991. The next prime is 22213007. The reversal of 22212997 is 79921222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19633761 + 2579236 = 4431^2 + 1606^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212997 - 2¹⁵ = 22180229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106498 + 11106499.

It is an arithmetic number, because the mean of its divisors is an integer number (11106499).

Almost surely, 2^22212997 is an apocalyptic number.

It is an amenable number.

22212997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212997 is an equidigital number, since it uses as much as digits as its factorization.

22212997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 22212997 is about 4713.0666237599. The cubic root of 22212997 is about 281.1053121137.

The spelling of 22212997 in words is "twenty-two million, two hundred twelve thousand, nine hundred ninety-seven".