11220239 has 4 divisors (see below), whose sum is σ = 11227440. Its totient is φ = 11213040.

The previous prime is 11220227. The next prime is 11220247. The reversal of 11220239 is 93202211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179 + ... + 4740.

It is an arithmetic number, because the mean of its divisors is an integer number (2806860).

Almost surely, 2^11220239 is an apocalyptic number.

11220239 is a deficient number, since it is larger than the sum of its proper divisors (7201).

11220239 is an equidigital number, since it uses as much as digits as its factorization.

11220239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 11220239 is about 3349.6625203145. The cubic root of 11220239 is about 223.8724760428.

The spelling of 11220239 in words is "eleven million, two hundred twenty thousand, two hundred thirty-nine".