22238819 has 2 divisors, whose sum is σ = 22238820. Its totient is φ = 22238818.

The previous prime is 22238809. The next prime is 22238891. The reversal of 22238819 is 91883222.

Together with next prime (22238891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22238819 - 2²⁰ = 21190243 is a prime.

It is a super-2 number, since 2×22238819² = 989130141029522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22238809) 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, 11119409 + 11119410.

It is an arithmetic number, because the mean of its divisors is an integer number (11119410).

Almost surely, 2^22238819 is an apocalyptic number.

22238819 is a deficient number, since it is larger than the sum of its proper divisors (1).

22238819 is an equidigital number, since it uses as much as digits as its factorization.

22238819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 22238819 is about 4715.8052334676. The cubic root of 22238819 is about 281.2141956726.

The spelling of 22238819 in words is "twenty-two million, two hundred thirty-eight thousand, eight hundred nineteen".