64217813 has 8 divisors (see below), whose sum is σ = 70126560. Its totient is φ = 58320880.

The previous prime is 64217809. The next prime is 64217819. The reversal of 64217813 is 31871246.

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 64217813 - 2² = 64217809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64217813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64217819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11531 + ... + 16167.

It is an arithmetic number, because the mean of its divisors is an integer number (8765820).

Almost surely, 2^64217813 is an apocalyptic number.

It is an amenable number.

64217813 is a deficient number, since it is larger than the sum of its proper divisors (5908747).

64217813 is a wasteful number, since it uses less digits than its factorization.

64217813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907.

The product of its digits is 8064, while the sum is 32.

The square root of 64217813 is about 8013.6017495256. The cubic root of 64217813 is about 400.4532632703.

The spelling of 64217813 in words is "sixty-four million, two hundred seventeen thousand, eight hundred thirteen".