804187221 has 8 divisors (see below), whose sum is σ = 1075698624. Its totient is φ = 534400320.

The previous prime is 804187211. The next prime is 804187253. The reversal of 804187221 is 122781408.

It is a happy number.

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

It is not a de Polignac number, because 804187221 - 2⁷ = 804187093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804187211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430036 + ... + 431901.

It is an arithmetic number, because the mean of its divisors is an integer number (134462328).

Almost surely, 2^804187221 is an apocalyptic number.

It is an amenable number.

804187221 is a deficient number, since it is larger than the sum of its proper divisors (271511403).

804187221 is a wasteful number, since it uses less digits than its factorization.

804187221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862251.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 804187221 is about 28358.1949531348. The cubic root of 804187221 is about 929.9345623977.

It can be divided in two parts, 804187 and 221, that added together give a palindrome (804408).

The spelling of 804187221 in words is "eight hundred four million, one hundred eighty-seven thousand, two hundred twenty-one".