221135 has 8 divisors (see below), whose sum is σ = 271296. Its totient is φ = 172960.

The previous prime is 221101. The next prime is 221159. The reversal of 221135 is 531122.

221135 = T₁₆ + T₁₇ + ... + T₁₀₉.

It is a happy number.

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

It is not a de Polignac number, because 221135 - 2⁶ = 221071 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

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, 236 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (33912).

2²²¹¹³⁵ is an apocalyptic number.

221135 is a deficient number, since it is larger than the sum of its proper divisors (50161).

221135 is an equidigital number, since it uses as much as digits as its factorization.

221135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993.

The product of its digits is 60, while the sum is 14.

The square root of 221135 is about 470.2499335460. The cubic root of 221135 is about 60.4717441991.

Adding to 221135 its reverse (531122), we get a palindrome (752257).

The spelling of 221135 in words is "two hundred twenty-one thousand, one hundred thirty-five".