6364043221 has 16 divisors (see below), whose sum is σ = 6488013168. Its totient is φ = 6241536000.

The previous prime is 6364043209. The next prime is 6364043237. The reversal of 6364043221 is 1223404636.

It can be written as a sum of positive squares in 8 ways, for example, as 813048196 + 5550995025 = 28514^2 + 74505^2 .

It is a cyclic number.

It is not a de Polignac number, because 6364043221 - 2²¹ = 6361946069 is a prime.

It is a super-2 number, since 2×6364043221² = 81002092237512109682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6364043281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9078171 + ... + 9078871.

It is an arithmetic number, because the mean of its divisors is an integer number (405500823).

Almost surely, 2^6364043221 is an apocalyptic number.

It is an amenable number.

6364043221 is a deficient number, since it is larger than the sum of its proper divisors (123969947).

6364043221 is a wasteful number, since it uses less digits than its factorization.

6364043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 6364043221 is about 79774.9535944710. The cubic root of 6364043221 is about 1853.1519893092.

Adding to 6364043221 its reverse (1223404636), we get a palindrome (7587447857).

The spelling of 6364043221 in words is "six billion, three hundred sixty-four million, forty-three thousand, two hundred twenty-one".