221115160 has 128 divisors (see below), whose sum is σ = 606528000. Its totient is φ = 70861824.

The previous prime is 221115151. The next prime is 221115241. The reversal of 221115160 is 61511122.

221115160 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473247 + ... + 473713.

It is an arithmetic number, because the mean of its divisors is an integer number (4738500).

Almost surely, 2^221115160 is an apocalyptic number.

221115160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221115160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303264000).

221115160 is an abundant number, since it is smaller than the sum of its proper divisors (385412840).

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

221115160 is a wasteful number, since it uses less digits than its factorization.

221115160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 221115160 is about 14869.9414928237. The cubic root of 221115160 is about 604.6993565792.

Adding to 221115160 its reverse (61511122), we get a palindrome (282626282).

It can be divided in two parts, 2211 and 15160, that added together give a palindrome (17371).

The spelling of 221115160 in words is "two hundred twenty-one million, one hundred fifteen thousand, one hundred sixty".