22778563 has 2 divisors, whose sum is σ = 22778564. Its totient is φ = 22778562.

The previous prime is 22778551. The next prime is 22778611. The reversal of 22778563 is 36587722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22778563 - 2¹⁷ = 22647491 is a prime.

It is not a weakly prime, because it can be changed into another prime (22778513) 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, 11389281 + 11389282.

It is an arithmetic number, because the mean of its divisors is an integer number (11389282).

Almost surely, 2^22778563 is an apocalyptic number.

22778563 is a deficient number, since it is larger than the sum of its proper divisors (1).

22778563 is an equidigital number, since it uses as much as digits as its factorization.

22778563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 22778563 is about 4772.6892838315. The cubic root of 22778563 is about 283.4710904125.

The spelling of 22778563 in words is "twenty-two million, seven hundred seventy-eight thousand, five hundred sixty-three".