22287847 has 2 divisors, whose sum is σ = 22287848. Its totient is φ = 22287846.

The previous prime is 22287829. The next prime is 22287857. The reversal of 22287847 is 74878222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22287847 - 2¹¹ = 22285799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22287857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11143923 + 11143924.

It is an arithmetic number, because the mean of its divisors is an integer number (11143924).

Almost surely, 2^22287847 is an apocalyptic number.

22287847 is a deficient number, since it is larger than the sum of its proper divisors (1).

22287847 is an equidigital number, since it uses as much as digits as its factorization.

22287847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 40.

The square root of 22287847 is about 4721.0006354585. Note that the first 3 decimals coincide. The cubic root of 22287847 is about 281.4207001942.

The spelling of 22287847 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred forty-seven".