6815212256 has 72 divisors (see below), whose sum is σ = 13790531664. Its totient is φ = 3314649600.

The previous prime is 6815212231. The next prime is 6815212259. The reversal of 6815212256 is 6522125186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815212259) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 45133781 + ... + 45133931.

It is an arithmetic number, because the mean of its divisors is an integer number (191535162).

Almost surely, 2^6815212256 is an apocalyptic number.

It is an amenable number.

6815212256 is an abundant number, since it is smaller than the sum of its proper divisors (6975319408).

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

6815212256 is a wasteful number, since it uses less digits than its factorization.

6815212256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 365 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 6815212256 is about 82554.2988341613. The cubic root of 6815212256 is about 1895.9481758105.

It can be divided in two parts, 68152 and 12256, that added together give a palindrome (80408).

The spelling of 6815212256 in words is "six billion, eight hundred fifteen million, two hundred twelve thousand, two hundred fifty-six".