22212823 has 2 divisors, whose sum is σ = 22212824.
Its totient is φ = 22212822.
The previous prime is 22212821. The next prime is 22212859. The reversal of 22212823 is 32821222.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 22212823 - 21 = 22212821 is a prime.
Together with 22212821, it forms a pair of twin primes.
It is a junction number, because it is equal to n+sod(n) for n = 22212794 and 22212803.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (22212821) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106411 + 11106412.
It is an arithmetic number, because the mean of its divisors is an integer number (11106412).
Almost surely, 222212823 is an apocalyptic number.
22212823 is a deficient number, since it is larger than the sum of its proper divisors (1).
22212823 is an equidigital number, since it uses as much as digits as its factorization.
22212823 is an evil number, because the sum of its binary digits is even.
The product of its digits is 768, while the sum is 22.
The square root of 22212823 is about 4713.0481644049.
The cubic root of 22212823 is about 281.1045781222.
The spelling of 22212823 in words is "twenty-two million, two hundred twelve thousand, eight hundred twenty-three".