220104161 has 4 divisors (see below), whose sum is σ = 223834800. Its totient is φ = 216373524.

The previous prime is 220104127. The next prime is 220104173. The reversal of 220104161 is 161401022.

220104161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161401022 = 2 ⋅80700511.

It is a cyclic number.

It is not a de Polignac number, because 220104161 - 2⁶ = 220104097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220104121) 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, 1865231 + ... + 1865348.

It is an arithmetic number, because the mean of its divisors is an integer number (55958700).

Almost surely, 2^220104161 is an apocalyptic number.

It is an amenable number.

220104161 is a deficient number, since it is larger than the sum of its proper divisors (3730639).

220104161 is an equidigital number, since it uses as much as digits as its factorization.

220104161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730638.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 220104161 is about 14835.9078252731. The cubic root of 220104161 is about 603.7763314119.

Adding to 220104161 its reverse (161401022), we get a palindrome (381505183).

The spelling of 220104161 in words is "two hundred twenty million, one hundred four thousand, one hundred sixty-one".