22105997 has 2 divisors, whose sum is σ = 22105998. Its totient is φ = 22105996.

The previous prime is 22105991. The next prime is 22106003. The reversal of 22105997 is 79950122.

It is a balanced prime because it is at equal distance from previous prime (22105991) and next prime (22106003).

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 72361 = 4694^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 22105997 - 2¹⁶ = 22040461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22105991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11052998 + 11052999.

It is an arithmetic number, because the mean of its divisors is an integer number (11052999).

Almost surely, 2^22105997 is an apocalyptic number.

It is an amenable number.

22105997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22105997 is an equidigital number, since it uses as much as digits as its factorization.

22105997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 22105997 is about 4701.7015005208. The cubic root of 22105997 is about 280.6532240302.

The spelling of 22105997 in words is "twenty-two million, one hundred five thousand, nine hundred ninety-seven".