8004162221 has 12 divisors (see below), whose sum is σ = 8800650432. Its totient is φ = 7274289000.

The previous prime is 8004162193. The next prime is 8004162263. The reversal of 8004162221 is 1222614008.

It is a happy number.

It is not a de Polignac number, because 8004162221 - 2⁶ = 8004162157 is a prime.

It is a super-2 number, since 2×8004162221² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8004162121) 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 11 ways as a sum of consecutive naturals, for example, 489386 + ... + 505476.

It is an arithmetic number, because the mean of its divisors is an integer number (733387536).

Almost surely, 2^8004162221 is an apocalyptic number.

It is an amenable number.

8004162221 is a deficient number, since it is larger than the sum of its proper divisors (796488211).

8004162221 is a wasteful number, since it uses less digits than its factorization.

8004162221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20224 (or 20213 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 8004162221 is about 89465.9835971192. The cubic root of 8004162221 is about 2000.3467916143.

Adding to 8004162221 its reverse (1222614008), we get a palindrome (9226776229).

The spelling of 8004162221 in words is "eight billion, four million, one hundred sixty-two thousand, two hundred twenty-one".