8162262221 has 4 divisors (see below), whose sum is σ = 8163900000. Its totient is φ = 8160624444.

The previous prime is 8162262109. The next prime is 8162262233. The reversal of 8162262221 is 1222622618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8162262221 - 2¹⁰ = 8162261197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8162292221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811391 + ... + 821388.

It is an arithmetic number, because the mean of its divisors is an integer number (2040975000).

Almost surely, 2^8162262221 is an apocalyptic number.

It is an amenable number.

8162262221 is a deficient number, since it is larger than the sum of its proper divisors (1637779).

8162262221 is a wasteful number, since it uses less digits than its factorization.

8162262221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637778.

The product of its digits is 9216, while the sum is 32.

The square root of 8162262221 is about 90345.2390610595. The cubic root of 8162262221 is about 2013.4314479296.

Adding to 8162262221 its reverse (1222622618), we get a palindrome (9384884839).

The spelling of 8162262221 in words is "eight billion, one hundred sixty-two million, two hundred sixty-two thousand, two hundred twenty-one".