22956881 has 2 divisors, whose sum is σ = 22956882. Its totient is φ = 22956880.

The previous prime is 22956811. The next prime is 22956889. The reversal of 22956881 is 18865922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22886656 + 70225 = 4784^2 + 265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22956881 is a prime.

It is a super-2 number, since 2×22956881² = 1054036770496322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22956889) 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, 11478440 + 11478441.

It is an arithmetic number, because the mean of its divisors is an integer number (11478441).

Almost surely, 2^22956881 is an apocalyptic number.

It is an amenable number.

22956881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22956881 is an equidigital number, since it uses as much as digits as its factorization.

22956881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 22956881 is about 4791.3339478688. Note that the first 3 decimals coincide. The cubic root of 22956881 is about 284.2088698547.

The spelling of 22956881 in words is "twenty-two million, nine hundred fifty-six thousand, eight hundred eighty-one".