21410315 has 4 divisors (see below), whose sum is σ = 25692384. Its totient is φ = 17128248.

The previous prime is 21410299. The next prime is 21410317. The reversal of 21410315 is 51301412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21410315 - 2⁴ = 21410299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21410293 and 21410302.

It is not an unprimeable number, because it can be changed into a prime (21410317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141027 + ... + 2141036.

It is an arithmetic number, because the mean of its divisors is an integer number (6423096).

Almost surely, 2^21410315 is an apocalyptic number.

21410315 is a deficient number, since it is larger than the sum of its proper divisors (4282069).

21410315 is an equidigital number, since it uses as much as digits as its factorization.

21410315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282068.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21410315 is about 4627.1281590205. The cubic root of 21410315 is about 277.6777099407.

Adding to 21410315 its reverse (51301412), we get a palindrome (72711727).

The spelling of 21410315 in words is "twenty-one million, four hundred ten thousand, three hundred fifteen".