221130304 has 28 divisors (see below), whose sum is σ = 441769500. Its totient is φ = 109818368.

The previous prime is 221130277. The next prime is 221130313. The reversal of 221130304 is 403031122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68558400 + 152571904 = 8280^2 + 12352^2 .

It is a super-2 number, since 2×221130304² = 97797222694264832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 2059 + ... + 21130.

Almost surely, 2^221130304 is an apocalyptic number.

It is an amenable number.

221130304 is a deficient number, since it is larger than the sum of its proper divisors (220639196).

221130304 is a wasteful number, since it uses less digits than its factorization.

221130304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23350 (or 23340 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221130304 is about 14870.4506992895. The cubic root of 221130304 is about 604.7131613888.

Adding to 221130304 its reverse (403031122), we get a palindrome (624161426).

The spelling of 221130304 in words is "two hundred twenty-one million, one hundred thirty thousand, three hundred four".