21313322 has 8 divisors (see below), whose sum is σ = 31993572. Its totient is φ = 10648800.

The previous prime is 21313301. The next prime is 21313333. The reversal of 21313322 is 22331312.

It can be written as a sum of positive squares in 2 ways, for example, as 14600041 + 6713281 = 3821^2 + 2591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21313322.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422 + ... + 6542.

Almost surely, 2^21313322 is an apocalyptic number.

21313322 is a deficient number, since it is larger than the sum of its proper divisors (10680250).

21313322 is a wasteful number, since it uses less digits than its factorization.

21313322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864.

The product of its digits is 216, while the sum is 17.

The square root of 21313322 is about 4616.6353548878. The cubic root of 21313322 is about 277.2577633386.

Adding to 21313322 its reverse (22331312), we get a palindrome (43644634).

The spelling of 21313322 in words is "twenty-one million, three hundred thirteen thousand, three hundred twenty-two".