221113320 has 32 divisors (see below), whose sum is σ = 663340320. Its totient is φ = 58963520.

The previous prime is 221113303. The next prime is 221113327. The reversal of 221113320 is 23311122.

It is a super-2 number, since 2×221113320² = 97782200562844800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221113320.

It is not an unprimeable number, because it can be changed into a prime (221113327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921186 + ... + 921425.

It is an arithmetic number, because the mean of its divisors is an integer number (20729385).

Almost surely, 2^221113320 is an apocalyptic number.

221113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221113320 is an abundant number, since it is smaller than the sum of its proper divisors (442227000).

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

221113320 is a wasteful number, since it uses less digits than its factorization.

221113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842625 (or 1842621 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221113320 is about 14869.8796229156. The cubic root of 221113320 is about 604.6976792483.

Adding to 221113320 its reverse (23311122), we get a palindrome (244424442).

The spelling of 221113320 in words is "two hundred twenty-one million, one hundred thirteen thousand, three hundred twenty".