221573163 has 16 divisors (see below), whose sum is σ = 337965056. Its totient is φ = 126489600.

The previous prime is 221573161. The next prime is 221573201. The reversal of 221573163 is 361375122.

221573163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221573163 - 2¹ = 221573161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221573163.

It is not an unprimeable number, because it can be changed into a prime (221573161) 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, 19638 + ... + 28788.

It is an arithmetic number, because the mean of its divisors is an integer number (21122816).

Almost surely, 2^221573163 is an apocalyptic number.

221573163 is a deficient number, since it is larger than the sum of its proper divisors (116391893).

221573163 is a wasteful number, since it uses less digits than its factorization.

221573163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314.

The product of its digits is 7560, while the sum is 30.

The square root of 221573163 is about 14885.3338222561. Note that the first 3 decimals coincide. The cubic root of 221573163 is about 605.1165797701.

The spelling of 221573163 in words is "two hundred twenty-one million, five hundred seventy-three thousand, one hundred sixty-three".