22563481 has 2 divisors, whose sum is σ = 22563482. Its totient is φ = 22563480.

The previous prime is 22563449. The next prime is 22563491. The reversal of 22563481 is 18436522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12425625 + 10137856 = 3525^2 + 3184^2 .

It is a cyclic number.

It is not a de Polignac number, because 22563481 - 2⁵ = 22563449 is a prime.

It is a super-2 number, since 2×22563481² = 1018221349674722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22563491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11281740 + 11281741.

It is an arithmetic number, because the mean of its divisors is an integer number (11281741).

Almost surely, 2^22563481 is an apocalyptic number.

It is an amenable number.

22563481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22563481 is an equidigital number, since it uses as much as digits as its factorization.

22563481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 22563481 is about 4750.1032620355. The cubic root of 22563481 is about 282.5760611753.

The spelling of 22563481 in words is "twenty-two million, five hundred sixty-three thousand, four hundred eighty-one".