220401164 has 12 divisors (see below), whose sum is σ = 385850304. Its totient is φ = 110158224.

The previous prime is 220401163. The next prime is 220401173. The reversal of 220401164 is 461104022.

It is not an unprimeable number, because it can be changed into a prime (220401163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3077 + ... + 21219.

It is an arithmetic number, because the mean of its divisors is an integer number (32154192).

Almost surely, 2^220401164 is an apocalyptic number.

It is an amenable number.

220401164 is a deficient number, since it is larger than the sum of its proper divisors (165449140).

220401164 is a wasteful number, since it uses less digits than its factorization.

220401164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21184 (or 21182 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 220401164 is about 14845.9140506740. The cubic root of 220401164 is about 604.0477828665.

Adding to 220401164 its reverse (461104022), we get a palindrome (681505186).

The spelling of 220401164 in words is "two hundred twenty million, four hundred one thousand, one hundred sixty-four".