6421322353 has 8 divisors (see below), whose sum is σ = 6444915048. Its totient is φ = 6397757184.

The previous prime is 6421322351. The next prime is 6421322357. The reversal of 6421322353 is 3532231246.

It can be written as a sum of positive squares in 4 ways, for example, as 495863824 + 5925458529 = 22268^2 + 76977^2 .

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 6421322353 - 2¹ = 6421322351 is a prime.

It is a super-2 number, since 2×6421322353² = 82466761522274913218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6421322351) 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, 537675 + ... + 549487.

It is an arithmetic number, because the mean of its divisors is an integer number (805614381).

Almost surely, 2^6421322353 is an apocalyptic number.

It is an amenable number.

6421322353 is a deficient number, since it is larger than the sum of its proper divisors (23592695).

6421322353 is a wasteful number, since it uses less digits than its factorization.

6421322353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13763.

The product of its digits is 25920, while the sum is 31.

The square root of 6421322353 is about 80133.1538940032. The cubic root of 6421322353 is about 1858.6951144650.

Adding to 6421322353 its reverse (3532231246), we get a palindrome (9953553599).

The spelling of 6421322353 in words is "six billion, four hundred twenty-one million, three hundred twenty-two thousand, three hundred fifty-three".