164324521 has 16 divisors (see below), whose sum is σ = 179791360. Its totient is φ = 149610240.

The previous prime is 164324519. The next prime is 164324557. The reversal of 164324521 is 125423461.

164324521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 164324521 - 2¹ = 164324519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164324521.

It is not an unprimeable number, because it can be changed into a prime (164324591) 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, 91585 + ... + 93361.

It is an arithmetic number, because the mean of its divisors is an integer number (11236960).

Almost surely, 2^164324521 is an apocalyptic number.

It is an amenable number.

164324521 is a deficient number, since it is larger than the sum of its proper divisors (15466839).

164324521 is a wasteful number, since it uses less digits than its factorization.

164324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984.

The product of its digits is 5760, while the sum is 28.

The square root of 164324521 is about 12818.9126293926. The cubic root of 164324521 is about 547.7311726457.

Adding to 164324521 its reverse (125423461), we get a palindrome (289747982).

The spelling of 164324521 in words is "one hundred sixty-four million, three hundred twenty-four thousand, five hundred twenty-one".