221115 has 8 divisors (see below), whose sum is σ = 353808. Its totient is φ = 117920.

The previous prime is 221101. The next prime is 221159. The reversal of 221115 is 511122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221115 - 2⁵ = 221083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221115.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7356 + ... + 7385.

It is an arithmetic number, because the mean of its divisors is an integer number (44226).

2²²¹¹¹⁵ is an apocalyptic number.

221115 is a deficient number, since it is larger than the sum of its proper divisors (132693).

221115 is a wasteful number, since it uses less digits than its factorization.

221115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749.

The product of its digits is 20, while the sum is 12.

The square root of 221115 is about 470.2286677777. The cubic root of 221115 is about 60.4699210725.

Adding to 221115 its reverse (511122), we get a palindrome (732237).

The spelling of 221115 in words is "two hundred twenty-one thousand, one hundred fifteen".