164343521 has 8 divisors (see below), whose sum is σ = 173740320. Its totient is φ = 155021472.

The previous prime is 164343499. The next prime is 164343523. The reversal of 164343521 is 125343461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164343521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164343523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14135 + ... + 22988.

It is an arithmetic number, because the mean of its divisors is an integer number (21717540).

Almost surely, 2^164343521 is an apocalyptic number.

It is an amenable number.

164343521 is a deficient number, since it is larger than the sum of its proper divisors (9396799).

164343521 is a wasteful number, since it uses less digits than its factorization.

164343521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37375.

The product of its digits is 8640, while the sum is 29.

The square root of 164343521 is about 12819.6537004710. The cubic root of 164343521 is about 547.7522822791.

Adding to 164343521 its reverse (125343461), we get a palindrome (289686982).

The spelling of 164343521 in words is "one hundred sixty-four million, three hundred forty-three thousand, five hundred twenty-one".