8315550221 has 8 divisors (see below), whose sum is σ = 9605127744. Its totient is φ = 7114909120.

The previous prime is 8315550209. The next prime is 8315550253. The reversal of 8315550221 is 1220555138.

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

It is a de Polignac number, because none of the positive numbers 2^k-8315550221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8315510221) 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 7 ways as a sum of consecutive naturals, for example, 22233905 + ... + 22234278.

It is an arithmetic number, because the mean of its divisors is an integer number (1200640968).

Almost surely, 2^8315550221 is an apocalyptic number.

It is an amenable number.

8315550221 is a deficient number, since it is larger than the sum of its proper divisors (1289577523).

8315550221 is a wasteful number, since it uses less digits than its factorization.

8315550221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44468211.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 8315550221 is about 91189.6387809492. The cubic root of 8315550221 is about 2025.9574983930.

The spelling of 8315550221 in words is "eight billion, three hundred fifteen million, five hundred fifty thousand, two hundred twenty-one".