8213159344 has 80 divisors (see below), whose sum is σ = 17796916480. Its totient is φ = 3667921920.

The previous prime is 8213159329. The next prime is 8213159347. The reversal of 8213159344 is 4439513128.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8213159297 and 8213159306.

It is not an unprimeable number, because it can be changed into a prime (8213159347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1085944 + ... + 1093480.

It is an arithmetic number, because the mean of its divisors is an integer number (222461456).

Almost surely, 2^8213159344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8213159344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8898458240).

8213159344 is an abundant number, since it is smaller than the sum of its proper divisors (9583757136).

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

8213159344 is a wasteful number, since it uses less digits than its factorization.

8213159344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7583 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 8213159344 is about 90626.4825754591. The cubic root of 8213159344 is about 2017.6078063254.

The spelling of 8213159344 in words is "eight billion, two hundred thirteen million, one hundred fifty-nine thousand, three hundred forty-four".