221340004 has 12 divisors (see below), whose sum is σ = 387475200. Its totient is φ = 110632808.

The previous prime is 221339999. The next prime is 221340019. The reversal of 221340004 is 400043122.

It is a self number, because there is not a number n which added to its sum of digits gives 221340004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7437 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (32289600).

Almost surely, 2^221340004 is an apocalyptic number.

It is an amenable number.

221340004 is a deficient number, since it is larger than the sum of its proper divisors (166135196).

221340004 is a wasteful number, since it uses less digits than its factorization.

221340004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18602 (or 18600 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 221340004 is about 14877.4999243825. The cubic root of 221340004 is about 604.9042527713.

Adding to 221340004 its reverse (400043122), we get a palindrome (621383126).

The spelling of 221340004 in words is "two hundred twenty-one million, three hundred forty thousand, four".