21311314 has 8 divisors (see below), whose sum is σ = 31999500. Its totient is φ = 10644816.

The previous prime is 21311261. The next prime is 21311347. The reversal of 21311314 is 41311312.

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 380689 = 4575^2 + 617^2 .

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

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, 2689 + ... + 7060.

Almost surely, 2^21311314 is an apocalyptic number.

21311314 is a deficient number, since it is larger than the sum of its proper divisors (10688186).

21311314 is a wasteful number, since it uses less digits than its factorization.

21311314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844.

The product of its digits is 72, while the sum is 16.

The square root of 21311314 is about 4616.4178753661. The cubic root of 21311314 is about 277.2490559353.

Adding to 21311314 its reverse (41311312), we get a palindrome (62622626).

The spelling of 21311314 in words is "twenty-one million, three hundred eleven thousand, three hundred fourteen".