220533601 has 4 divisors (see below), whose sum is σ = 222717204. Its totient is φ = 218350000.

The previous prime is 220533581. The next prime is 220533611. The reversal of 220533601 is 106335022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 155650576 + 64883025 = 12476^2 + 8055^2 .

It is a cyclic number.

It is not a de Polignac number, because 220533601 - 2²³ = 212144993 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220533611) 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, 1091650 + ... + 1091851.

It is an arithmetic number, because the mean of its divisors is an integer number (55679301).

Almost surely, 2^220533601 is an apocalyptic number.

It is an amenable number.

220533601 is a deficient number, since it is larger than the sum of its proper divisors (2183603).

220533601 is a wasteful number, since it uses less digits than its factorization.

220533601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183602.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 220533601 is about 14850.3737663400. The cubic root of 220533601 is about 604.1687475304.

Adding to 220533601 its reverse (106335022), we get a palindrome (326868623).

The spelling of 220533601 in words is "two hundred twenty million, five hundred thirty-three thousand, six hundred one".