22222647 has 16 divisors (see below), whose sum is σ = 34656000. Its totient is φ = 14035032.

The previous prime is 22222643. The next prime is 22222649. The reversal of 22222647 is 74622222.

It is not a de Polignac number, because 22222647 - 2² = 22222643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22222647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21147 + ... + 22172.

It is an arithmetic number, because the mean of its divisors is an integer number (2166000).

Almost surely, 2^22222647 is an apocalyptic number.

22222647 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

22222647 is a deficient number, since it is larger than the sum of its proper divisors (12433353).

22222647 is a wasteful number, since it uses less digits than its factorization.

22222647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43347 (or 43341 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 22222647 is about 4714.0902621821. The cubic root of 22222647 is about 281.1460131131.

Adding to 22222647 its reverse (74622222), we get a palindrome (96844869).

The spelling of 22222647 in words is "twenty-two million, two hundred twenty-two thousand, six hundred forty-seven".