22147291 has 2 divisors, whose sum is σ = 22147292. Its totient is φ = 22147290.

The previous prime is 22147289. The next prime is 22147309. The reversal of 22147291 is 19274122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22147291 - 2¹ = 22147289 is a prime.

Together with 22147289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22147231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073645 + 11073646.

It is an arithmetic number, because the mean of its divisors is an integer number (11073646).

Almost surely, 2^22147291 is an apocalyptic number.

22147291 is a deficient number, since it is larger than the sum of its proper divisors (1).

22147291 is an equidigital number, since it uses as much as digits as its factorization.

22147291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 22147291 is about 4706.0908406022. The cubic root of 22147291 is about 280.8278687272.

The spelling of 22147291 in words is "twenty-two million, one hundred forty-seven thousand, two hundred ninety-one".