8313267521 has 8 divisors (see below), whose sum is σ = 9075391080. Its totient is φ = 7568664192.

The previous prime is 8313267511. The next prime is 8313267553. The reversal of 8313267521 is 1257623138.

It can be written as a sum of positive squares in 4 ways, for example, as 688485121 + 7624782400 = 26239^2 + 87320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8313267521 is a prime.

It is a super-2 number, since 2×8313267521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8313267511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4379066 + ... + 4380963.

It is an arithmetic number, because the mean of its divisors is an integer number (1134423885).

Almost surely, 2^8313267521 is an apocalyptic number.

It is an amenable number.

8313267521 is a deficient number, since it is larger than the sum of its proper divisors (762123559).

8313267521 is a wasteful number, since it uses less digits than its factorization.

8313267521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760115.

The product of its digits is 60480, while the sum is 38.

The square root of 8313267521 is about 91177.1216972767. The cubic root of 8313267521 is about 2025.7720997004.

The spelling of 8313267521 in words is "eight billion, three hundred thirteen million, two hundred sixty-seven thousand, five hundred twenty-one".