6751310921 has 4 divisors (see below), whose sum is σ = 6751477200. Its totient is φ = 6751144644.

The previous prime is 6751310899. The next prime is 6751310939. The reversal of 6751310921 is 1290131576.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6751310921 - 2¹⁰ = 6751309897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6751310021) 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, 22550 + ... + 118368.

It is an arithmetic number, because the mean of its divisors is an integer number (1687869300).

Almost surely, 2^6751310921 is an apocalyptic number.

It is an amenable number.

6751310921 is a deficient number, since it is larger than the sum of its proper divisors (166279).

6751310921 is an equidigital number, since it uses as much as digits as its factorization.

6751310921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166278.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 6751310921 is about 82166.3612496014. The cubic root of 6751310921 is about 1890.0039118831.

The spelling of 6751310921 in words is "six billion, seven hundred fifty-one million, three hundred ten thousand, nine hundred twenty-one".