164243215 has 8 divisors (see below), whose sum is σ = 198597168. Its totient is φ = 130391040.

The previous prime is 164243203. The next prime is 164243221. The reversal of 164243215 is 512342461.

164243215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 164243215 - 2¹⁹ = 163718927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124722 + ... + 126031.

It is an arithmetic number, because the mean of its divisors is an integer number (24824646).

Almost surely, 2^164243215 is an apocalyptic number.

164243215 is a deficient number, since it is larger than the sum of its proper divisors (34353953).

164243215 is a wasteful number, since it uses less digits than its factorization.

164243215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250889.

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

The square root of 164243215 is about 12815.7409071813. The cubic root of 164243215 is about 547.6408205842.

Adding to 164243215 its reverse (512342461), we get a palindrome (676585676).

The spelling of 164243215 in words is "one hundred sixty-four million, two hundred forty-three thousand, two hundred fifteen".