22721246 has 4 divisors (see below), whose sum is σ = 34081872. Its totient is φ = 11360622.

The previous prime is 22721227. The next prime is 22721261. The reversal of 22721246 is 64212722.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5680310 + ... + 5680313.

It is an arithmetic number, because the mean of its divisors is an integer number (8520468).

Almost surely, 2^22721246 is an apocalyptic number.

22721246 is a deficient number, since it is larger than the sum of its proper divisors (11360626).

22721246 is a wasteful number, since it uses less digits than its factorization.

22721246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360625.

The product of its digits is 2688, while the sum is 26.

The square root of 22721246 is about 4766.6808158298. The cubic root of 22721246 is about 283.2331275019.

Adding to 22721246 its reverse (64212722), we get a palindrome (86933968).

The spelling of 22721246 in words is "twenty-two million, seven hundred twenty-one thousand, two hundred forty-six".