220105523 has 4 divisors (see below), whose sum is σ = 240115128. Its totient is φ = 200095920.

The previous prime is 220105517. The next prime is 220105531. The reversal of 220105523 is 325501022.

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 220105523 - 2²⁶ = 152996659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220105495 and 220105504.

It is not an unprimeable number, because it can be changed into a prime (220105573) 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, 10004786 + ... + 10004807.

It is an arithmetic number, because the mean of its divisors is an integer number (60028782).

Almost surely, 2^220105523 is an apocalyptic number.

220105523 is a deficient number, since it is larger than the sum of its proper divisors (20009605).

220105523 is a wasteful number, since it uses less digits than its factorization.

220105523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009604.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 220105523 is about 14835.9537273476. The cubic root of 220105523 is about 603.7775767945. Note that the first 3 decimals are identical.

Adding to 220105523 its reverse (325501022), we get a palindrome (545606545).

The spelling of 220105523 in words is "two hundred twenty million, one hundred five thousand, five hundred twenty-three".