164320515 has 64 divisors (see below), whose sum is σ = 305118720. Its totient is φ = 83825280.

The previous prime is 164320459. The next prime is 164320517. The reversal of 164320515 is 515023461.

164320515 is a `hidden beast` number, since 1 + 643 + 2 + 0 + 5 + 15 = 666.

It is not a de Polignac number, because 164320515 - 2⁶ = 164320451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (164320517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 334420 + ... + 334910.

It is an arithmetic number, because the mean of its divisors is an integer number (4767480).

Almost surely, 2^164320515 is an apocalyptic number.

164320515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164320515 is a deficient number, since it is larger than the sum of its proper divisors (140798205).

164320515 is a wasteful number, since it uses less digits than its factorization.

164320515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 164320515 is about 12818.7563749375. The cubic root of 164320515 is about 547.7267216385.

Adding to 164320515 its reverse (515023461), we get a palindrome (679343976).

The spelling of 164320515 in words is "one hundred sixty-four million, three hundred twenty thousand, five hundred fifteen".