21622322 has 4 divisors (see below), whose sum is σ = 32433486. Its totient is φ = 10811160.

The previous prime is 21622301. The next prime is 21622327. The reversal of 21622322 is 22322612.

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., 18054001 + 3568321 = 4249^2 + 1889^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21622294 and 21622303.

It is not an unprimeable number, because it can be changed into a prime (21622327) 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 as a sum of consecutive naturals, namely, 5405579 + ... + 5405582.

Almost surely, 2^21622322 is an apocalyptic number.

21622322 is a deficient number, since it is larger than the sum of its proper divisors (10811164).

21622322 is a wasteful number, since it uses less digits than its factorization.

21622322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811163.

The product of its digits is 576, while the sum is 20.

The square root of 21622322 is about 4649.9808601757. The cubic root of 21622322 is about 278.5912317533.

Adding to 21622322 its reverse (22322612), we get a palindrome (43944934).

The spelling of 21622322 in words is "twenty-one million, six hundred twenty-two thousand, three hundred twenty-two".