6945722281 has 3 divisors (see below), whose sum is σ = 6945805623. Its totient is φ = 6945638940.

The previous prime is 6945722261. The next prime is 6945722323. The reversal of 6945722281 is 1822275496.

The square root of 6945722281 is 83341.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 6258233881 + 687488400 = 79109^2 + 26220^2 .

It is not a de Polignac number, because 6945722281 - 2¹¹ = 6945720233 is a prime.

It is a super-2 number, since 2×6945722281² = 96486116009559685922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6945722221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 41671 + ... + 125011.

It is an arithmetic number, because the mean of its divisors is an integer number (2315268541).

Almost surely, 2^6945722281 is an apocalyptic number.

6945722281 is the 83341-st square number.

6945722281 is the 41671-st centered octagonal number.

It is an amenable number.

6945722281 is a deficient number, since it is larger than the sum of its proper divisors (83342).

6945722281 is an frugal number, since it uses more digits than its factorization.

6945722281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166682 (or 83341 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The cubic root of 6945722281 is about 1907.9740843617.

The spelling of 6945722281 in words is "six billion, nine hundred forty-five million, seven hundred twenty-two thousand, two hundred eighty-one".