6317215021 has 8 divisors (see below), whose sum is σ = 6807744440. Its totient is φ = 5827341312.

The previous prime is 6317214947. The next prime is 6317215031. The reversal of 6317215021 is 1205127136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74476900 + 6242738121 = 8630^2 + 79011^2 .

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

It is not a de Polignac number, because 6317215021 - 2⁹ = 6317214509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6317215031) 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, 143820 + ... + 182533.

It is an arithmetic number, because the mean of its divisors is an integer number (850968055).

Almost surely, 2^6317215021 is an apocalyptic number.

It is an amenable number.

6317215021 is a deficient number, since it is larger than the sum of its proper divisors (490529419).

6317215021 is a wasteful number, since it uses less digits than its factorization.

6317215021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327855.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 6317215021 is about 79480.9097897099. The cubic root of 6317215021 is about 1848.5954784897.

The spelling of 6317215021 in words is "six billion, three hundred seventeen million, two hundred fifteen thousand, twenty-one".