220623161 has 16 divisors (see below), whose sum is σ = 258655680. Its totient is φ = 185940480.

The previous prime is 220623157. The next prime is 220623167. The reversal of 220623161 is 161326022.

220623161 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 220623161 - 2² = 220623157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220623167) 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, 3725 + ... + 21333.

It is an arithmetic number, because the mean of its divisors is an integer number (16165980).

Almost surely, 2^220623161 is an apocalyptic number.

It is an amenable number.

220623161 is a deficient number, since it is larger than the sum of its proper divisors (38032519).

220623161 is a wasteful number, since it uses less digits than its factorization.

220623161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17704.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 220623161 is about 14853.3888725772. The cubic root of 220623161 is about 604.2505219626.

Adding to 220623161 its reverse (161326022), we get a palindrome (381949183).

The spelling of 220623161 in words is "two hundred twenty million, six hundred twenty-three thousand, one hundred sixty-one".