64216871 has 4 divisors (see below), whose sum is σ = 67994352. Its totient is φ = 60439392.

The previous prime is 64216853. The next prime is 64216877. The reversal of 64216871 is 17861246.

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 64216871 - 2¹⁰ = 64215847 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 (64216877) 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, 1888715 + ... + 1888748.

It is an arithmetic number, because the mean of its divisors is an integer number (16998588).

Almost surely, 2^64216871 is an apocalyptic number.

64216871 is a deficient number, since it is larger than the sum of its proper divisors (3777481).

64216871 is a wasteful number, since it uses less digits than its factorization.

64216871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777480.

The product of its digits is 16128, while the sum is 35.

The square root of 64216871 is about 8013.5429742405. The cubic root of 64216871 is about 400.4513052009.

The spelling of 64216871 in words is "sixty-four million, two hundred sixteen thousand, eight hundred seventy-one".