6815431272 has 64 divisors (see below), whose sum is σ = 18739687680. Its totient is φ = 2052433152.

The previous prime is 6815431267. The next prime is 6815431297. The reversal of 6815431272 is 2721345186.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 6815431272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217723 + ... + 247050.

It is an arithmetic number, because the mean of its divisors is an integer number (292807620).

Almost surely, 2^6815431272 is an apocalyptic number.

It is an amenable number.

6815431272 is an abundant number, since it is smaller than the sum of its proper divisors (11924256408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6815431272 is a wasteful number, since it uses less digits than its factorization.

6815431272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464842 (or 464838 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 6815431272 is about 82555.6253201440. The cubic root of 6815431272 is about 1895.9684852067.

The spelling of 6815431272 in words is "six billion, eight hundred fifteen million, four hundred thirty-one thousand, two hundred seventy-two".