8251720312 has 16 divisors (see below), whose sum is σ = 16878519000. Its totient is φ = 3750781920.

The previous prime is 8251720307. The next prime is 8251720319. The reversal of 8251720312 is 2130271528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251720319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46884687 + ... + 46884862.

Almost surely, 2^8251720312 is an apocalyptic number.

It is an amenable number.

8251720312 is an abundant number, since it is smaller than the sum of its proper divisors (8626798688).

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

8251720312 is a wasteful number, since it uses less digits than its factorization.

8251720312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93769566 (or 93769562 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 8251720312 is about 90838.9801351821. The cubic root of 8251720312 is about 2020.7604489076.

The spelling of 8251720312 in words is "eight billion, two hundred fifty-one million, seven hundred twenty thousand, three hundred twelve".