6375213421 has 4 divisors (see below), whose sum is σ = 6375379644. Its totient is φ = 6375047200.

The previous prime is 6375213409. The next prime is 6375213499. The reversal of 6375213421 is 1243125736.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3649851396 + 2725362025 = 60414^2 + 52205^2 .

It is a cyclic number.

It is not a de Polignac number, because 6375213421 - 2¹⁷ = 6375082349 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 (6375243421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6951 + ... + 113131.

It is an arithmetic number, because the mean of its divisors is an integer number (1593844911).

Almost surely, 2^6375213421 is an apocalyptic number.

It is an amenable number.

6375213421 is a deficient number, since it is larger than the sum of its proper divisors (166223).

6375213421 is a wasteful number, since it uses less digits than its factorization.

6375213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166222.

The product of its digits is 30240, while the sum is 34.

The square root of 6375213421 is about 79844.9335963153. The cubic root of 6375213421 is about 1854.2355760830.

The spelling of 6375213421 in words is "six billion, three hundred seventy-five million, two hundred thirteen thousand, four hundred twenty-one".