21271064315 has 8 divisors (see below), whose sum is σ = 26348673408. Its totient is φ = 16467920640.

The previous prime is 21271064293. The next prime is 21271064323. The reversal of 21271064315 is 51346017212.

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

It is not a de Polignac number, because 21271064315 - 2¹⁶ = 21270998779 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68616182 + ... + 68616491.

It is an arithmetic number, because the mean of its divisors is an integer number (3293584176).

Almost surely, 2^21271064315 is an apocalyptic number.

21271064315 is a deficient number, since it is larger than the sum of its proper divisors (5077609093).

21271064315 is a wasteful number, since it uses less digits than its factorization.

21271064315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137232709.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21271064315 in words is "twenty-one billion, two hundred seventy-one million, sixty-four thousand, three hundred fifteen".