22143447 has 12 divisors (see below), whose sum is σ = 32220240. Its totient is φ = 14653728.

The previous prime is 22143421. The next prime is 22143449. The reversal of 22143447 is 74434122.

22143447 is a `hidden beast` number, since 2 + 214 + 3 + 447 = 666.

It is not a de Polignac number, because 22143447 - 2⁶ = 22143383 is a prime.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 22143447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7747 + ... + 10212.

It is an arithmetic number, because the mean of its divisors is an integer number (2685020).

Almost surely, 2^22143447 is an apocalyptic number.

22143447 is a deficient number, since it is larger than the sum of its proper divisors (10076793).

22143447 is a wasteful number, since it uses less digits than its factorization.

22143447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18102 (or 18099 counting only the distinct ones).

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

The square root of 22143447 is about 4705.6824159733. The cubic root of 22143447 is about 280.8116204678.

Adding to 22143447 its reverse (74434122), we get a palindrome (96577569).

The spelling of 22143447 in words is "twenty-two million, one hundred forty-three thousand, four hundred forty-seven".