8314721520 has 80 divisors (see below), whose sum is σ = 29457876480. Its totient is φ = 1900507392.

The previous prime is 8314721491. The next prime is 8314721521. The reversal of 8314721520 is 251274138.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×8314721520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8314721521) 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, 2472940 + ... + 2476299.

It is an arithmetic number, because the mean of its divisors is an integer number (368223456).

Almost surely, 2^8314721520 is an apocalyptic number.

8314721520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8314721520 is an abundant number, since it is smaller than the sum of its proper divisors (21143154960).

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

8314721520 is a wasteful number, since it uses less digits than its factorization.

8314721520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949262 (or 4949256 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 8314721520 is about 91185.0948346274. The cubic root of 8314721520 is about 2025.8901960203.

Adding to 8314721520 its reverse (251274138), we get a palindrome (8565995658).

The spelling of 8314721520 in words is "eight billion, three hundred fourteen million, seven hundred twenty-one thousand, five hundred twenty".