21322322 has 16 divisors (see below), whose sum is σ = 36818880. Its totient is φ = 9071568.

The previous prime is 21322319. The next prime is 21322331. The reversal of 21322322 is 22322312.

It is a self number, because there is not a number n which added to its sum of digits gives 21322322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3533 + ... + 7424.

It is an arithmetic number, because the mean of its divisors is an integer number (2301180).

Almost surely, 2^21322322 is an apocalyptic number.

21322322 is a deficient number, since it is larger than the sum of its proper divisors (15496558).

21322322 is a wasteful number, since it uses less digits than its factorization.

21322322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11105.

The product of its digits is 288, while the sum is 17.

The square root of 21322322 is about 4617.6099878617. The cubic root of 21322322 is about 277.2967838273.

Adding to 21322322 its reverse (22322312), we get a palindrome (43644634).

The spelling of 21322322 in words is "twenty-one million, three hundred twenty-two thousand, three hundred twenty-two".