221030404 has 12 divisors (see below), whose sum is σ = 442060864. Its totient is φ = 94727304.

The previous prime is 221030353. The next prime is 221030423. The reversal of 221030404 is 404030122.

221030404 is an admirable number.

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, 3946944 + ... + 3946999.

Almost surely, 2^221030404 is an apocalyptic number.

It is an amenable number.

221030404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221030404 is a wasteful number, since it uses less digits than its factorization.

221030404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893954 (or 7893952 counting only the distinct ones).

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

The square root of 221030404 is about 14867.0913093315. The cubic root of 221030404 is about 604.6220839512.

Adding to 221030404 its reverse (404030122), we get a palindrome (625060526).

The spelling of 221030404 in words is "two hundred twenty-one million, thirty thousand, four hundred four".