220161233 has 4 divisors (see below), whose sum is σ = 220193700. Its totient is φ = 220128768.

The previous prime is 220161223. The next prime is 220161239. The reversal of 220161233 is 332161022.

It is a happy number.

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 140469904 + 79691329 = 11852^2 + 8927^2 .

It is a cyclic number.

It is not a de Polignac number, because 220161233 - 2⁴ = 220161217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220161239) 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, 1760 + ... + 21057.

It is an arithmetic number, because the mean of its divisors is an integer number (55048425).

Almost surely, 2^220161233 is an apocalyptic number.

It is an amenable number.

220161233 is a deficient number, since it is larger than the sum of its proper divisors (32467).

220161233 is an equidigital number, since it uses as much as digits as its factorization.

220161233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32466.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 220161233 is about 14837.8311420504. The cubic root of 220161233 is about 603.8285123804.

The spelling of 220161233 in words is "two hundred twenty million, one hundred sixty-one thousand, two hundred thirty-three".