220345523 has 4 divisors (see below), whose sum is σ = 220440600. Its totient is φ = 220250448.

The previous prime is 220345511. The next prime is 220345529. The reversal of 220345523 is 325543022.

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 220345523 - 2⁴ = 220345507 is a prime.

It is a super-2 number, since 2×220345523² = 97104299012287058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220345492 and 220345501.

It is not an unprimeable number, because it can be changed into a prime (220345529) 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, 43973 + ... + 48726.

It is an arithmetic number, because the mean of its divisors is an integer number (55110150).

Almost surely, 2^220345523 is an apocalyptic number.

220345523 is a deficient number, since it is larger than the sum of its proper divisors (95077).

220345523 is an equidigital number, since it uses as much as digits as its factorization.

220345523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95076.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 220345523 is about 14844.0399824307. The cubic root of 220345523 is about 603.9969473041.

Adding to 220345523 its reverse (325543022), we get a palindrome (545888545).

The spelling of 220345523 in words is "two hundred twenty million, three hundred forty-five thousand, five hundred twenty-three".