22161697 has 2 divisors, whose sum is σ = 22161698. Its totient is φ = 22161696.

The previous prime is 22161679. The next prime is 22161701. The reversal of 22161697 is 79616122.

Together with previous prime (22161679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 221841 = 4684^2 + 471^2 .

It is a cyclic number.

It is not a de Polignac number, because 22161697 - 2¹⁵ = 22128929 is a prime.

It is a super-2 number, since 2×22161697² = 982281627839618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22161617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11080848 + 11080849.

It is an arithmetic number, because the mean of its divisors is an integer number (11080849).

Almost surely, 2^22161697 is an apocalyptic number.

It is an amenable number.

22161697 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161697 is an equidigital number, since it uses as much as digits as its factorization.

22161697 is an odious number, because the sum of its binary digits is odd.

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

The square root of 22161697 is about 4707.6211614785. The cubic root of 22161697 is about 280.8887449373. Note that the first 3 decimals are identical.

The spelling of 22161697 in words is "twenty-two million, one hundred sixty-one thousand, six hundred ninety-seven".