6315221 has 8 divisors (see below), whose sum is σ = 6973344. Its totient is φ = 5671120.

The previous prime is 6315217. The next prime is 6315223. The reversal of 6315221 is 1225136.

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 6315221 - 2² = 6315217 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6315193 and 6315202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6315223) 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 7 ways as a sum of consecutive naturals, for example, 2546 + ... + 4371.

It is an arithmetic number, because the mean of its divisors is an integer number (871668).

Almost surely, 2^6315221 is an apocalyptic number.

It is an amenable number.

6315221 is a deficient number, since it is larger than the sum of its proper divisors (658123).

6315221 is a wasteful number, since it uses less digits than its factorization.

6315221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011.

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

The square root of 6315221 is about 2513.0103461785. The cubic root of 6315221 is about 184.8400955740.

The spelling of 6315221 in words is "six million, three hundred fifteen thousand, two hundred twenty-one".