21134313 has 6 divisors (see below), whose sum is σ = 30527354. Its totient is φ = 14089536.

The previous prime is 21134293. The next prime is 21134353. The reversal of 21134313 is 31343112.

It can be written as a sum of positive squares in only one way, i.e., 10810944 + 10323369 = 3288^2 + 3213^2 .

It is not a de Polignac number, because 21134313 - 2⁶ = 21134249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21134353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174120 + ... + 1174137.

Almost surely, 2^21134313 is an apocalyptic number.

It is an amenable number.

21134313 is a deficient number, since it is larger than the sum of its proper divisors (9393041).

21134313 is a wasteful number, since it uses less digits than its factorization.

21134313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348263 (or 2348260 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 21134313 is about 4597.2070869170. The cubic root of 21134313 is about 276.4793575796.

Adding to 21134313 its reverse (31343112), we get a palindrome (52477425).

The spelling of 21134313 in words is "twenty-one million, one hundred thirty-four thousand, three hundred thirteen".