8172220516 has 6 divisors (see below), whose sum is σ = 14301385910. Its totient is φ = 4086110256.

The previous prime is 8172220513. The next prime is 8172220517. The reversal of 8172220516 is 6150222718.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8172160000 + 60516 = 90400^2 + 246^2 .

It is not an unprimeable number, because it can be changed into a prime (8172220513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021527561 + ... + 1021527568.

Almost surely, 2^8172220516 is an apocalyptic number.

It is an amenable number.

8172220516 is a deficient number, since it is larger than the sum of its proper divisors (6129165394).

8172220516 is a wasteful number, since it uses less digits than its factorization.

8172220516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043055133 (or 2043055131 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 8172220516 is about 90400.3347117697. The cubic root of 8172220516 is about 2014.2499381642.

The spelling of 8172220516 in words is "eight billion, one hundred seventy-two million, two hundred twenty thousand, five hundred sixteen".