64164215 has 4 divisors (see below), whose sum is σ = 76997064. Its totient is φ = 51331368.

The previous prime is 64164209. The next prime is 64164241. The reversal of 64164215 is 51246146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64164215 - 2⁶ = 64164151 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 3 ways as a sum of consecutive naturals, for example, 6416417 + ... + 6416426.

It is an arithmetic number, because the mean of its divisors is an integer number (19249266).

Almost surely, 2^64164215 is an apocalyptic number.

64164215 is a deficient number, since it is larger than the sum of its proper divisors (12832849).

64164215 is a wasteful number, since it uses less digits than its factorization.

64164215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12832848.

The product of its digits is 5760, while the sum is 29.

The square root of 64164215 is about 8010.2568622985. The cubic root of 64164215 is about 400.3418223938.

The spelling of 64164215 in words is "sixty-four million, one hundred sixty-four thousand, two hundred fifteen".