8150646221 has 4 divisors (see below), whose sum is σ = 8151041244. Its totient is φ = 8150251200.

The previous prime is 8150646199. The next prime is 8150646227. The reversal of 8150646221 is 1226460518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61622500 + 8089023721 = 7850^2 + 89939^2 .

It is a cyclic number.

It is not a de Polignac number, because 8150646221 - 2⁶ = 8150646157 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 (8150646227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164750 + ... + 208431.

It is an arithmetic number, because the mean of its divisors is an integer number (2037760311).

Almost surely, 2^8150646221 is an apocalyptic number.

It is an amenable number.

8150646221 is a deficient number, since it is larger than the sum of its proper divisors (395023).

8150646221 is a wasteful number, since it uses less digits than its factorization.

8150646221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395022.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 8150646221 is about 90280.9294424908. The cubic root of 8150646221 is about 2012.4758663104.

The spelling of 8150646221 in words is "eight billion, one hundred fifty million, six hundred forty-six thousand, two hundred twenty-one".