221036 has 6 divisors (see below), whose sum is σ = 386820. Its totient is φ = 110516.

The previous prime is 221021. The next prime is 221047. The reversal of 221036 is 630122.

221036 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221036.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221036.

It is an unprimeable number.

221036 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27626 + ... + 27633.

It is an arithmetic number, because the mean of its divisors is an integer number (64470).

2²²¹⁰³⁶ is an apocalyptic number.

It is an amenable number.

221036 is a deficient number, since it is larger than the sum of its proper divisors (165784).

221036 is a wasteful number, since it uses less digits than its factorization.

221036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55263 (or 55261 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221036 is about 470.1446585892. The cubic root of 221036 is about 60.4627186472.

Adding to 221036 its reverse (630122), we get a palindrome (851158).

The spelling of 221036 in words is "two hundred twenty-one thousand, thirty-six".