22561243 has 2 divisors, whose sum is σ = 22561244. Its totient is φ = 22561242.

The previous prime is 22561219. The next prime is 22561247. The reversal of 22561243 is 34216522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22561243 - 2¹⁷ = 22430171 is a prime.

It is equal to p_1422295 and since 22561243 and 1422295 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22561247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11280621 + 11280622.

It is an arithmetic number, because the mean of its divisors is an integer number (11280622).

Almost surely, 2^22561243 is an apocalyptic number.

22561243 is a deficient number, since it is larger than the sum of its proper divisors (1).

22561243 is an equidigital number, since it uses as much as digits as its factorization.

22561243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 22561243 is about 4749.8676823676. The cubic root of 22561243 is about 282.5667182591.

Adding to 22561243 its reverse (34216522), we get a palindrome (56777765).

The spelling of 22561243 in words is "twenty-two million, five hundred sixty-one thousand, two hundred forty-three".