221363004 has 12 divisors (see below), whose sum is σ = 516513704. Its totient is φ = 73787664.

The previous prime is 221362993. The next prime is 221363027. The reversal of 221363004 is 400363122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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, 9223447 + ... + 9223470.

Almost surely, 2^221363004 is an apocalyptic number.

It is an amenable number.

221363004 is an abundant number, since it is smaller than the sum of its proper divisors (295150700).

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

221363004 is a wasteful number, since it uses less digits than its factorization.

221363004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446924 (or 18446922 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 221363004 is about 14878.2728836381. The cubic root of 221363004 is about 604.9252044229.

The spelling of 221363004 in words is "two hundred twenty-one million, three hundred sixty-three thousand, four".