21231314 has 8 divisors (see below), whose sum is σ = 34296780. Its totient is φ = 9799056.

The previous prime is 21231313. The next prime is 21231359. The reversal of 21231314 is 41313212.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 4133089 = 4135^2 + 2033^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21231292 and 21231301.

It is not an unprimeable number, because it can be changed into a prime (21231313) 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, 408269 + ... + 408320.

Almost surely, 2^21231314 is an apocalyptic number.

21231314 is a deficient number, since it is larger than the sum of its proper divisors (13065466).

21231314 is a wasteful number, since it uses less digits than its factorization.

21231314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816604.

The product of its digits is 144, while the sum is 17.

The square root of 21231314 is about 4607.7450016250. The cubic root of 21231314 is about 276.9017015354.

Adding to 21231314 its reverse (41313212), we get a palindrome (62544526).

The spelling of 21231314 in words is "twenty-one million, two hundred thirty-one thousand, three hundred fourteen".