6231681481 has 3 divisors (see below), whose sum is σ = 6231760423. Its totient is φ = 6231602540.

The previous prime is 6231681361. The next prime is 6231681487. The reversal of 6231681481 is 1841861326.

The square root of 6231681481 is 78941.

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., 992817081 + 5238864400 = 31509^2 + 72380^2 .

It is not a de Polignac number, because 6231681481 - 2⁹ = 6231680969 is a prime.

It is a super-2 number, since 2×6231681481² = 77667708161276706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6231681487) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39471 + ... + 118411.

Almost surely, 2^6231681481 is an apocalyptic number.

6231681481 is the 78941-st square number.

6231681481 is the 39471-st centered octagonal number.

It is an amenable number.

6231681481 is a deficient number, since it is larger than the sum of its proper divisors (78942).

6231681481 is an frugal number, since it uses more digits than its factorization.

6231681481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157882 (or 78941 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The cubic root of 6231681481 is about 1840.2143615451.

The spelling of 6231681481 in words is "six billion, two hundred thirty-one million, six hundred eighty-one thousand, four hundred eighty-one".