22721063 has 4 divisors (see below), whose sum is σ = 22730688. Its totient is φ = 22711440.

The previous prime is 22721057. The next prime is 22721081. The reversal of 22721063 is 36012722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22721063 - 2⁸ = 22720807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721053) 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, 1418 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (5682672).

Almost surely, 2^22721063 is an apocalyptic number.

22721063 is a deficient number, since it is larger than the sum of its proper divisors (9625).

22721063 is an equidigital number, since it uses as much as digits as its factorization.

22721063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 22721063 is about 4766.6616200439. The cubic root of 22721063 is about 283.2323671006.

Adding to 22721063 its reverse (36012722), we get a palindrome (58733785).

The spelling of 22721063 in words is "twenty-two million, seven hundred twenty-one thousand, sixty-three".