22238891 has 2 divisors, whose sum is σ = 22238892. Its totient is φ = 22238890.

The previous prime is 22238819. The next prime is 22238903. The reversal of 22238891 is 19883222.

Together with previous prime (22238819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22238891 - 2¹⁴ = 22222507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22238791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11119445 + 11119446.

It is an arithmetic number, because the mean of its divisors is an integer number (11119446).

Almost surely, 2^22238891 is an apocalyptic number.

22238891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22238891 is an equidigital number, since it uses as much as digits as its factorization.

22238891 is an evil number, because the sum of its binary digits is even.

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

The square root of 22238891 is about 4715.8128673644. The cubic root of 22238891 is about 281.2144991569.

The spelling of 22238891 in words is "twenty-two million, two hundred thirty-eight thousand, eight hundred ninety-one".