164243515 has 8 divisors (see below), whose sum is σ = 197526240. Its totient is φ = 131105472.

The previous prime is 164243507. The next prime is 164243539. The reversal of 164243515 is 515342461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 164243515 - 2³ = 164243507 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33655 + ... + 38224.

It is an arithmetic number, because the mean of its divisors is an integer number (24690780).

Almost surely, 2^164243515 is an apocalyptic number.

164243515 is a deficient number, since it is larger than the sum of its proper divisors (33282725).

164243515 is an equidigital number, since it uses as much as digits as its factorization.

164243515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72341.

The product of its digits is 14400, while the sum is 31.

The square root of 164243515 is about 12815.7526115324. The cubic root of 164243515 is about 547.6411540168.

Adding to 164243515 its reverse (515342461), we get a palindrome (679585976).

The spelling of 164243515 in words is "one hundred sixty-four million, two hundred forty-three thousand, five hundred fifteen".