22115647 has 2 divisors, whose sum is σ = 22115648. Its totient is φ = 22115646.

The previous prime is 22115609. The next prime is 22115651. The reversal of 22115647 is 74651122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22115647 - 2⁷ = 22115519 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 (22115047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11057823 + 11057824.

It is an arithmetic number, because the mean of its divisors is an integer number (11057824).

Almost surely, 2^22115647 is an apocalyptic number.

22115647 is a deficient number, since it is larger than the sum of its proper divisors (1).

22115647 is an equidigital number, since it uses as much as digits as its factorization.

22115647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 22115647 is about 4702.7276127796. The cubic root of 22115647 is about 280.6940562324.

Adding to 22115647 its reverse (74651122), we get a palindrome (96766769).

The spelling of 22115647 in words is "twenty-two million, one hundred fifteen thousand, six hundred forty-seven".