8147530221 has 16 divisors (see below), whose sum is σ = 11123988480. Its totient is φ = 5301560880.

The previous prime is 8147530217. The next prime is 8147530273. The reversal of 8147530221 is 1220357418.

It is not a de Polignac number, because 8147530221 - 2² = 8147530217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8147530121) 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 15 ways as a sum of consecutive naturals, for example, 163686 + ... + 207576.

It is an arithmetic number, because the mean of its divisors is an integer number (695249280).

Almost surely, 2^8147530221 is an apocalyptic number.

It is an amenable number.

8147530221 is a deficient number, since it is larger than the sum of its proper divisors (2976458259).

8147530221 is a wasteful number, since it uses less digits than its factorization.

8147530221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45376.

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

The square root of 8147530221 is about 90263.6705491196. The cubic root of 8147530221 is about 2012.2193764600.

Adding to 8147530221 its reverse (1220357418), we get a palindrome (9367887639).

The spelling of 8147530221 in words is "eight billion, one hundred forty-seven million, five hundred thirty thousand, two hundred twenty-one".