22231747 has 4 divisors (see below), whose sum is σ = 22284976. Its totient is φ = 22178520.

The previous prime is 22231723. The next prime is 22231757. The reversal of 22231747 is 74713222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22231747 - 2²³ = 13843139 is a prime.

It is a super-4 number, since 4×22231747⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22231757) 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 in 3 ways as a sum of consecutive naturals, for example, 25983 + ... + 26824.

It is an arithmetic number, because the mean of its divisors is an integer number (5571244).

Almost surely, 2^22231747 is an apocalyptic number.

22231747 is a deficient number, since it is larger than the sum of its proper divisors (53229).

22231747 is an equidigital number, since it uses as much as digits as its factorization.

22231747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53228.

The product of its digits is 4704, while the sum is 28.

The square root of 22231747 is about 4715.0553549243. The cubic root of 22231747 is about 281.1843835733.

Adding to 22231747 its reverse (74713222), we get a palindrome (96944969).

The spelling of 22231747 in words is "twenty-two million, two hundred thirty-one thousand, seven hundred forty-seven".