21282322 has 4 divisors (see below), whose sum is σ = 31923486. Its totient is φ = 10641160.

The previous prime is 21282319. The next prime is 21282341. The reversal of 21282322 is 22328212.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 18913801 + 2368521 = 4349^2 + 1539^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21282293 and 21282302.

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 as a sum of consecutive naturals, namely, 5320579 + ... + 5320582.

Almost surely, 2^21282322 is an apocalyptic number.

21282322 is a deficient number, since it is larger than the sum of its proper divisors (10641164).

21282322 is a wasteful number, since it uses less digits than its factorization.

21282322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10641163.

The product of its digits is 768, while the sum is 22.

The square root of 21282322 is about 4613.2767096718. The cubic root of 21282322 is about 277.1232752918.

The spelling of 21282322 in words is "twenty-one million, two hundred eighty-two thousand, three hundred twenty-two".