164320501 has 4 divisors (see below), whose sum is σ = 168141952. Its totient is φ = 160499052.

The previous prime is 164320459. The next prime is 164320517. The reversal of 164320501 is 105023461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164320501 - 2⁹ = 164319989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164320561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910661 + ... + 1910746.

It is an arithmetic number, because the mean of its divisors is an integer number (42035488).

Almost surely, 2^164320501 is an apocalyptic number.

It is an amenable number.

164320501 is a deficient number, since it is larger than the sum of its proper divisors (3821451).

164320501 is an equidigital number, since it uses as much as digits as its factorization.

164320501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821450.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 164320501 is about 12818.7558288626. The cubic root of 164320501 is about 547.7267060831.

Adding to 164320501 its reverse (105023461), we get a palindrome (269343962).

The spelling of 164320501 in words is "one hundred sixty-four million, three hundred twenty thousand, five hundred one".