220311230655 has 16 divisors (see below), whose sum is σ = 353496555360. Its totient is φ = 117166460928.

The previous prime is 220311230653. The next prime is 220311230707. The reversal of 220311230655 is 556032113022.

It is not a de Polignac number, because 220311230655 - 2¹ = 220311230653 is a prime.

It is a super-2 number, since 2×220311230655² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220311230653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20798410 + ... + 20808999.

It is an arithmetic number, because the mean of its divisors is an integer number (22093534710).

Almost surely, 2^220311230655 is an apocalyptic number.

220311230655 is a deficient number, since it is larger than the sum of its proper divisors (133185324705).

220311230655 is a wasteful number, since it uses less digits than its factorization.

220311230655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41607770.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 220311230655 its reverse (556032113022), we get a palindrome (776343343677).

The spelling of 220311230655 in words is "two hundred twenty billion, three hundred eleven million, two hundred thirty thousand, six hundred fifty-five".