220311361 has 4 divisors (see below), whose sum is σ = 220714672. Its totient is φ = 219908052.

The previous prime is 220311359. The next prime is 220311379. The reversal of 220311361 is 163113022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220311361 - 2¹ = 220311359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220318361) 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, 200835 + ... + 201928.

It is an arithmetic number, because the mean of its divisors is an integer number (55178668).

Almost surely, 2^220311361 is an apocalyptic number.

It is an amenable number.

220311361 is a deficient number, since it is larger than the sum of its proper divisors (403311).

220311361 is an equidigital number, since it uses as much as digits as its factorization.

220311361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403310.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 220311361 is about 14842.8892403063. The cubic root of 220311361 is about 603.9657314666.

Adding to 220311361 its reverse (163113022), we get a palindrome (383424383).

The spelling of 220311361 in words is "two hundred twenty million, three hundred eleven thousand, three hundred sixty-one".