8213159345 has 4 divisors (see below), whose sum is σ = 9855791220. Its totient is φ = 6570527472.

The previous prime is 8213159329. The next prime is 8213159347. The reversal of 8213159345 is 5439513128.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2090409841 + 6122749504 = 45721^2 + 78248^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213159345 - 2⁴ = 8213159329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8213159347) 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, 821315930 + ... + 821315939.

It is an arithmetic number, because the mean of its divisors is an integer number (2463947805).

Almost surely, 2^8213159345 is an apocalyptic number.

It is an amenable number.

8213159345 is a deficient number, since it is larger than the sum of its proper divisors (1642631875).

8213159345 is a wasteful number, since it uses less digits than its factorization.

8213159345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642631874.

The product of its digits is 129600, while the sum is 41.

The square root of 8213159345 is about 90626.4825809763. The cubic root of 8213159345 is about 2017.6078064073.

The spelling of 8213159345 in words is "eight billion, two hundred thirteen million, one hundred fifty-nine thousand, three hundred forty-five".