22781113 has 2 divisors, whose sum is σ = 22781114. Its totient is φ = 22781112.

The previous prime is 22781111. The next prime is 22781167. The reversal of 22781113 is 31118722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11778624 + 11002489 = 3432^2 + 3317^2 .

It is a cyclic number.

It is not a de Polignac number, because 22781113 - 2¹ = 22781111 is a prime.

Together with 22781111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22781111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11390556 + 11390557.

It is an arithmetic number, because the mean of its divisors is an integer number (11390557).

Almost surely, 2^22781113 is an apocalyptic number.

It is an amenable number.

22781113 is a deficient number, since it is larger than the sum of its proper divisors (1).

22781113 is an equidigital number, since it uses as much as digits as its factorization.

22781113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 22781113 is about 4772.9564213389. The cubic root of 22781113 is about 283.4816679645.

Adding to 22781113 its reverse (31118722), we get a palindrome (53899835).

The spelling of 22781113 in words is "twenty-two million, seven hundred eighty-one thousand, one hundred thirteen".