21334313 has 16 divisors (see below), whose sum is σ = 28646016. Its totient is φ = 15344640.

The previous prime is 21334253. The next prime is 21334319. The reversal of 21334313 is 31343312.

It is a cyclic number.

It is not a de Polignac number, because 21334313 - 2¹⁶ = 21268777 is a prime.

It is a super-2 number, since 2×21334313² = 910305822363938, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21334319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9656 + ... + 11657.

It is an arithmetic number, because the mean of its divisors is an integer number (1790376).

Almost surely, 2^21334313 is an apocalyptic number.

It is an amenable number.

21334313 is a deficient number, since it is larger than the sum of its proper divisors (7311703).

21334313 is a wasteful number, since it uses less digits than its factorization.

21334313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21344.

The product of its digits is 648, while the sum is 20.

The square root of 21334313 is about 4618.9082043271. The cubic root of 21334313 is about 277.3487550686.

Adding to 21334313 its reverse (31343312), we get a palindrome (52677625).

It can be divided in two parts, 2133 and 4313, that added together give a palindrome (6446).

The spelling of 21334313 in words is "twenty-one million, three hundred thirty-four thousand, three hundred thirteen".