22561939 has 2 divisors, whose sum is σ = 22561940. Its totient is φ = 22561938.

The previous prime is 22561933. The next prime is 22561943. The reversal of 22561939 is 93916522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22561939 - 2¹¹ = 22559891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22561898 and 22561907.

It is not a weakly prime, because it can be changed into another prime (22561933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11280969 + 11280970.

It is an arithmetic number, because the mean of its divisors is an integer number (11280970).

Almost surely, 2^22561939 is an apocalyptic number.

22561939 is a deficient number, since it is larger than the sum of its proper divisors (1).

22561939 is an equidigital number, since it uses as much as digits as its factorization.

22561939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 22561939 is about 4749.9409470013. The cubic root of 22561939 is about 282.5696238971.

The spelling of 22561939 in words is "twenty-two million, five hundred sixty-one thousand, nine hundred thirty-nine".