221596804 has 48 divisors (see below), whose sum is σ = 470324736. Its totient is φ = 89971200.

The previous prime is 221596799. The next prime is 221596813. The reversal of 221596804 is 408695122.

It is a super-3 number, since 3×221596804³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11484 + ... + 23980.

It is an arithmetic number, because the mean of its divisors is an integer number (9798432).

Almost surely, 2^221596804 is an apocalyptic number.

It is an amenable number.

221596804 is an abundant number, since it is smaller than the sum of its proper divisors (248727932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221596804 is a wasteful number, since it uses less digits than its factorization.

221596804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12556 (or 12554 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 221596804 is about 14886.1279048650. The cubic root of 221596804 is about 605.1381002047.

The spelling of 221596804 in words is "two hundred twenty-one million, five hundred ninety-six thousand, eight hundred four".