22245747 has 8 divisors (see below), whose sum is σ = 29791440. Its totient is φ = 14765280.

The previous prime is 22245731. The next prime is 22245757. The reversal of 22245747 is 74754222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22245747 - 2⁴ = 22245731 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22245757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15504 + ... + 16877.

It is an arithmetic number, because the mean of its divisors is an integer number (3723930).

Almost surely, 2^22245747 is an apocalyptic number.

22245747 is a deficient number, since it is larger than the sum of its proper divisors (7545693).

22245747 is a wasteful number, since it uses less digits than its factorization.

22245747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32613.

The product of its digits is 31360, while the sum is 33.

The square root of 22245747 is about 4716.5397273849. The cubic root of 22245747 is about 281.2433946103.

Adding to 22245747 its reverse (74754222), we get a palindrome (96999969).

The spelling of 22245747 in words is "twenty-two million, two hundred forty-five thousand, seven hundred forty-seven".