22516601 has 2 divisors, whose sum is σ = 22516602. Its totient is φ = 22516600.

The previous prime is 22516579. The next prime is 22516603. The reversal of 22516601 is 10661522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19149376 + 3367225 = 4376^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22516601 - 2⁶ = 22516537 is a prime.

It is a Sophie Germain prime.

Together with 22516603, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22516603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11258300 + 11258301.

It is an arithmetic number, because the mean of its divisors is an integer number (11258301).

Almost surely, 2^22516601 is an apocalyptic number.

It is an amenable number.

22516601 is a deficient number, since it is larger than the sum of its proper divisors (1).

22516601 is an equidigital number, since it uses as much as digits as its factorization.

22516601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22516601 is about 4745.1660666409. The cubic root of 22516601 is about 282.3802233246.

The spelling of 22516601 in words is "twenty-two million, five hundred sixteen thousand, six hundred one".