220306320523 has 4 divisors (see below), whose sum is σ = 226260545440. Its totient is φ = 214352095608.

The previous prime is 220306320497. The next prime is 220306320541. The reversal of 220306320523 is 325023603022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220306320523 - 2⁹ = 220306320011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220306320491 and 220306320500.

It is not an unprimeable number, because it can be changed into a prime (220306330523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2977112403 + ... + 2977112476.

It is an arithmetic number, because the mean of its divisors is an integer number (56565136360).

Almost surely, 2^220306320523 is an apocalyptic number.

220306320523 is a deficient number, since it is larger than the sum of its proper divisors (5954224917).

220306320523 is an equidigital number, since it uses as much as digits as its factorization.

220306320523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954224916.

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 220306320523 its reverse (325023603022), we get a palindrome (545329923545).

The spelling of 220306320523 in words is "two hundred twenty billion, three hundred six million, three hundred twenty thousand, five hundred twenty-three".