220523 has 4 divisors (see below), whose sum is σ = 222768. Its totient is φ = 218280.

The previous prime is 220513. The next prime is 220529. The reversal of 220523 is 325022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220498 and 220507.

It is not an unprimeable number, because it can be changed into a prime (220529) 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, 968 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2²²⁰⁵²³ is an apocalyptic number.

220523 is a deficient number, since it is larger than the sum of its proper divisors (2245).

220523 is a wasteful number, since it uses less digits than its factorization.

220523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 220523 is about 469.5987649047. The cubic root of 220523 is about 60.4159066624.

Adding to 220523 its reverse (325022), we get a palindrome (545545).

The spelling of 220523 in words is "two hundred twenty thousand, five hundred twenty-three".