22000291 has 2 divisors, whose sum is σ = 22000292. Its totient is φ = 22000290.

The previous prime is 22000289. The next prime is 22000327. The reversal of 22000291 is 19200022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22000291 - 2¹ = 22000289 is a prime.

Together with 22000289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000145 + 11000146.

It is an arithmetic number, because the mean of its divisors is an integer number (11000146).

Almost surely, 2^22000291 is an apocalyptic number.

22000291 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000291 is an equidigital number, since it uses as much as digits as its factorization.

22000291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22000291 is about 4690.4467804251. The cubic root of 22000291 is about 280.2051685047.

The spelling of 22000291 in words is "twenty-two million, two hundred ninety-one", and thus it is an aban number.