64218871 has 4 divisors (see below), whose sum is σ = 64507072. Its totient is φ = 63930672.

The previous prime is 64218859. The next prime is 64218883. The reversal of 64218871 is 17881246.

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

It is an interprime number because it is at equal distance from previous prime (64218859) and next prime (64218883).

It is a cyclic number.

It is not a de Polignac number, because 64218871 - 2⁵ = 64218839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64218871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64218071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143766 + ... + 144211.

It is an arithmetic number, because the mean of its divisors is an integer number (16126768).

Almost surely, 2^64218871 is an apocalyptic number.

64218871 is a deficient number, since it is larger than the sum of its proper divisors (288201).

64218871 is a wasteful number, since it uses less digits than its factorization.

64218871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288200.

The product of its digits is 21504, while the sum is 37.

The square root of 64218871 is about 8013.6677620176. The cubic root of 64218871 is about 400.4554624381.

The spelling of 64218871 in words is "sixty-four million, two hundred eighteen thousand, eight hundred seventy-one".