22288447 has 2 divisors, whose sum is σ = 22288448. Its totient is φ = 22288446.

The previous prime is 22288439. The next prime is 22288451. The reversal of 22288447 is 74488222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22288447 - 2³ = 22288439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144223 + 11144224.

It is an arithmetic number, because the mean of its divisors is an integer number (11144224).

Almost surely, 2^22288447 is an apocalyptic number.

22288447 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288447 is an equidigital number, since it uses as much as digits as its factorization.

22288447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 37.

The square root of 22288447 is about 4721.0641808813. The cubic root of 22288447 is about 281.4232255003.

The spelling of 22288447 in words is "twenty-two million, two hundred eighty-eight thousand, four hundred forty-seven".