21341315 has 8 divisors (see below), whose sum is σ = 25664688. Its totient is φ = 17036320.

The previous prime is 21341249. The next prime is 21341317. The reversal of 21341315 is 51314312.

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

It is not a de Polignac number, because 21341315 - 2¹² = 21337219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21341317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (3208086).

Almost surely, 2^21341315 is an apocalyptic number.

21341315 is a deficient number, since it is larger than the sum of its proper divisors (4323373).

21341315 is an equidigital number, since it uses as much as digits as its factorization.

21341315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189.

The product of its digits is 360, while the sum is 20.

The square root of 21341315 is about 4619.6661134762. Note that the first 3 decimals coincide. The cubic root of 21341315 is about 277.3790940436.

Adding to 21341315 its reverse (51314312), we get a palindrome (72655627).

The spelling of 21341315 in words is "twenty-one million, three hundred forty-one thousand, three hundred fifteen".