64216249 has 8 divisors (see below), whose sum is σ = 65449440. Its totient is φ = 62988000.

The previous prime is 64216247. The next prime is 64216261. The reversal of 64216249 is 94261246.

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 64216249 - 2¹ = 64216247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64216247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34554 + ... + 36364.

It is an arithmetic number, because the mean of its divisors is an integer number (8181180).

Almost surely, 2^64216249 is an apocalyptic number.

It is an amenable number.

64216249 is a deficient number, since it is larger than the sum of its proper divisors (1233191).

64216249 is a wasteful number, since it uses less digits than its factorization.

64216249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471.

The product of its digits is 20736, while the sum is 34.

The square root of 64216249 is about 8013.5041648457. The cubic root of 64216249 is about 400.4500122825.

The spelling of 64216249 in words is "sixty-four million, two hundred sixteen thousand, two hundred forty-nine".