220440311 has 8 divisors (see below), whose sum is σ = 271311264. Its totient is φ = 174414240.

The previous prime is 220440289. The next prime is 220440329. The reversal of 220440311 is 113044022.

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

It is a de Polignac number, because none of the positive numbers 2^k-220440311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220440311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220440331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211120 + ... + 1211301.

It is an arithmetic number, because the mean of its divisors is an integer number (33913908).

Almost surely, 2^220440311 is an apocalyptic number.

220440311 is a deficient number, since it is larger than the sum of its proper divisors (50870953).

220440311 is a wasteful number, since it uses less digits than its factorization.

220440311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422441.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220440311 is about 14847.2324357100. The cubic root of 220440311 is about 604.0835438070.

Adding to 220440311 its reverse (113044022), we get a palindrome (333484333).

The spelling of 220440311 in words is "two hundred twenty million, four hundred forty thousand, three hundred eleven".