22279247 has 2 divisors, whose sum is σ = 22279248. Its totient is φ = 22279246.

The previous prime is 22279199. The next prime is 22279319. The reversal of 22279247 is 74297222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22279247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22279447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11139623 + 11139624.

It is an arithmetic number, because the mean of its divisors is an integer number (11139624).

Almost surely, 2^22279247 is an apocalyptic number.

22279247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22279247 is an equidigital number, since it uses as much as digits as its factorization.

22279247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 22279247 is about 4720.0897237235. The cubic root of 22279247 is about 281.3844991594.

The spelling of 22279247 in words is "twenty-two million, two hundred seventy-nine thousand, two hundred forty-seven".