220400323 has 16 divisors (see below), whose sum is σ = 272563200. Its totient is φ = 175214880.

The previous prime is 220400317. The next prime is 220400333. The reversal of 220400323 is 323004022.

It is a cyclic number.

It is not a de Polignac number, because 220400323 - 2²⁵ = 186845891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220400297 and 220400306.

It is not an unprimeable number, because it can be changed into a prime (220400333) 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, 37843 + ... + 43276.

It is an arithmetic number, because the mean of its divisors is an integer number (17035200).

Almost surely, 2^220400323 is an apocalyptic number.

220400323 is a deficient number, since it is larger than the sum of its proper divisors (52162877).

220400323 is a wasteful number, since it uses less digits than its factorization.

220400323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81162.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 220400323 is about 14845.8857263553. The cubic root of 220400323 is about 604.0470145632.

Adding to 220400323 its reverse (323004022), we get a palindrome (543404345).

The spelling of 220400323 in words is "two hundred twenty million, four hundred thousand, three hundred twenty-three".