22112813 has 2 divisors, whose sum is σ = 22112814. Its totient is φ = 22112812.

The previous prime is 22112809. The next prime is 22112833. The reversal of 22112813 is 31821122.

It is an a-pointer prime, because the next prime (22112833) can be obtained adding 22112813 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 3948169 = 4262^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112813 - 2² = 22112809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056406 + 11056407.

It is an arithmetic number, because the mean of its divisors is an integer number (11056407).

Almost surely, 2^22112813 is an apocalyptic number.

It is an amenable number.

22112813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112813 is an equidigital number, since it uses as much as digits as its factorization.

22112813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 22112813 is about 4702.4262886302. The cubic root of 22112813 is about 280.6820659141.

Adding to 22112813 its reverse (31821122), we get a palindrome (53933935).

The spelling of 22112813 in words is "twenty-two million, one hundred twelve thousand, eight hundred thirteen".