22697561 has 2 divisors, whose sum is σ = 22697562. Its totient is φ = 22697560.

The previous prime is 22697557. The next prime is 22697603. The reversal of 22697561 is 16579622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14969161 + 7728400 = 3869^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 22697561 - 2² = 22697557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22697531) 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, 11348780 + 11348781.

It is an arithmetic number, because the mean of its divisors is an integer number (11348781).

Almost surely, 2^22697561 is an apocalyptic number.

It is an amenable number.

22697561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22697561 is an equidigital number, since it uses as much as digits as its factorization.

22697561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 22697561 is about 4764.1957348539. The cubic root of 22697561 is about 283.1346776642.

The spelling of 22697561 in words is "twenty-two million, six hundred ninety-seven thousand, five hundred sixty-one".