164213220 has 48 divisors (see below), whose sum is σ = 467345088. Its totient is φ = 43071360.

The previous prime is 164213197. The next prime is 164213227. The reversal of 164213220 is 22312461.

164213220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (164213227) 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, 18774 + ... + 26093.

It is an arithmetic number, because the mean of its divisors is an integer number (9736356).

Almost surely, 2^164213220 is an apocalyptic number.

164213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164213220 is an abundant number, since it is smaller than the sum of its proper divisors (303131868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164213220 is a wasteful number, since it uses less digits than its factorization.

164213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44940 (or 44938 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 164213220 is about 12814.5706131731. The cubic root of 164213220 is about 547.6074808275.

Adding to 164213220 its reverse (22312461), we get a palindrome (186525681).

The spelling of 164213220 in words is "one hundred sixty-four million, two hundred thirteen thousand, two hundred twenty".