21303322 has 4 divisors (see below), whose sum is σ = 31954986. Its totient is φ = 10651660.

The previous prime is 21303319. The next prime is 21303341. The reversal of 21303322 is 22330312.

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., 15295921 + 6007401 = 3911^2 + 2451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21303296 and 21303305.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325829 + ... + 5325832.

Almost surely, 2^21303322 is an apocalyptic number.

21303322 is a deficient number, since it is larger than the sum of its proper divisors (10651664).

21303322 is a wasteful number, since it uses less digits than its factorization.

21303322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651663.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21303322 is about 4615.5521879836. The cubic root of 21303322 is about 277.2143943545.

Adding to 21303322 its reverse (22330312), we get a palindrome (43633634).

The spelling of 21303322 in words is "twenty-one million, three hundred three thousand, three hundred twenty-two".