22782559 has 2 divisors, whose sum is σ = 22782560. Its totient is φ = 22782558.

The previous prime is 22782553. The next prime is 22782569. The reversal of 22782559 is 95528722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22782559 - 2¹⁷ = 22651487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22782553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11391279 + 11391280.

It is an arithmetic number, because the mean of its divisors is an integer number (11391280).

Almost surely, 2^22782559 is an apocalyptic number.

22782559 is a deficient number, since it is larger than the sum of its proper divisors (1).

22782559 is an equidigital number, since it uses as much as digits as its factorization.

22782559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 22782559 is about 4773.1078973767. The cubic root of 22782559 is about 283.4876657080.

The spelling of 22782559 in words is "twenty-two million, seven hundred eighty-two thousand, five hundred fifty-nine".