22221313 has 4 divisors (see below), whose sum is σ = 22441428. Its totient is φ = 22001200.

The previous prime is 22221307. The next prime is 22221319. The reversal of 22221313 is 31312222.

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

It is an interprime number because it is at equal distance from previous prime (22221307) and next prime (22221319).

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 4048144 = 4263^2 + 2012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221313 is a prime.

It is a super-3 number, since 3×22221313³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109906 + ... + 110107.

It is an arithmetic number, because the mean of its divisors is an integer number (5610357).

Almost surely, 2^22221313 is an apocalyptic number.

It is an amenable number.

22221313 is a deficient number, since it is larger than the sum of its proper divisors (220115).

22221313 is a wasteful number, since it uses less digits than its factorization.

22221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220114.

The product of its digits is 144, while the sum is 16.

The square root of 22221313 is about 4713.9487693440. The cubic root of 22221313 is about 281.1403873763.

Adding to 22221313 its reverse (31312222), we get a palindrome (53533535).

Subtracting 22221313 from its reverse (31312222), we obtain a palindrome (9090909).

The spelling of 22221313 in words is "twenty-two million, two hundred twenty-one thousand, three hundred thirteen".