21701315 has 8 divisors (see below), whose sum is σ = 26334720. Its totient is φ = 17165632.

The previous prime is 21701297. The next prime is 21701371. The reversal of 21701315 is 51310712.

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

It is a cyclic number.

It is not a de Polignac number, because 21701315 - 2¹⁰ = 21700291 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23939 + ... + 24828.

It is an arithmetic number, because the mean of its divisors is an integer number (3291840).

Almost surely, 2^21701315 is an apocalyptic number.

21701315 is a deficient number, since it is larger than the sum of its proper divisors (4633405).

21701315 is an equidigital number, since it uses as much as digits as its factorization.

21701315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48861.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 21701315 is about 4658.4670225301. The cubic root of 21701315 is about 278.9300792998.

The spelling of 21701315 in words is "twenty-one million, seven hundred one thousand, three hundred fifteen".