221236004 has 12 divisors (see below), whose sum is σ = 422359728. Its totient is φ = 100561800.

The previous prime is 221235997. The next prime is 221236009. The reversal of 221236004 is 400632122.

It is not an unprimeable number, because it can be changed into a prime (221236009) 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, 2514002 + ... + 2514089.

It is an arithmetic number, because the mean of its divisors is an integer number (35196644).

Almost surely, 2^221236004 is an apocalyptic number.

It is an amenable number.

221236004 is a deficient number, since it is larger than the sum of its proper divisors (201123724).

221236004 is a wasteful number, since it uses less digits than its factorization.

221236004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028106 (or 5028104 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 221236004 is about 14874.0043028097. The cubic root of 221236004 is about 604.8094967446.

Adding to 221236004 its reverse (400632122), we get a palindrome (621868126).

The spelling of 221236004 in words is "two hundred twenty-one million, two hundred thirty-six thousand, four".