220318249 has 8 divisors (see below), whose sum is σ = 241322760. Its totient is φ = 200207616.

The previous prime is 220318229. The next prime is 220318261. The reversal of 220318249 is 942813022.

It can be written as a sum of positive squares in 4 ways, for example, as 114639849 + 105678400 = 10707^2 + 10280^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 220318249 - 2⁹ = 220317737 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 220318249.

It is not an unprimeable number, because it can be changed into a prime (220318229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222954 + ... + 223939.

It is an arithmetic number, because the mean of its divisors is an integer number (30165345).

Almost surely, 2^220318249 is an apocalyptic number.

220318249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

220318249 is a deficient number, since it is larger than the sum of its proper divisors (21004511).

220318249 is a wasteful number, since it uses less digits than its factorization.

220318249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446939.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 220318249 is about 14843.1212687898. The cubic root of 220318249 is about 603.9720256988.

The spelling of 220318249 in words is "two hundred twenty million, three hundred eighteen thousand, two hundred forty-nine".