22021313 has 4 divisors (see below), whose sum is σ = 22031280. Its totient is φ = 22011348.

The previous prime is 22021301. The next prime is 22021319. The reversal of 22021313 is 31312022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22021313 - 2⁶ = 22021249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (5507820).

Almost surely, 2^22021313 is an apocalyptic number.

It is an amenable number.

22021313 is a deficient number, since it is larger than the sum of its proper divisors (9967).

22021313 is an equidigital number, since it uses as much as digits as its factorization.

22021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9966.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22021313 is about 4692.6871832672. The cubic root of 22021313 is about 280.2943885044.

Adding to 22021313 its reverse (31312022), we get a palindrome (53333335).

The spelling of 22021313 in words is "twenty-two million, twenty-one thousand, three hundred thirteen".