64381213 has 8 divisors (see below), whose sum is σ = 70509600. Its totient is φ = 58420848.

The previous prime is 64381201. The next prime is 64381217. The reversal of 64381213 is 31218346.

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 64381213 - 2⁵ = 64381181 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 (64381217) 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, 41203 + ... + 42736.

It is an arithmetic number, because the mean of its divisors is an integer number (8813700).

Almost surely, 2^64381213 is an apocalyptic number.

It is an amenable number.

64381213 is a deficient number, since it is larger than the sum of its proper divisors (6128387).

64381213 is a wasteful number, since it uses less digits than its factorization.

64381213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84011.

The product of its digits is 3456, while the sum is 28.

The square root of 64381213 is about 8023.7904384399. The cubic root of 64381213 is about 400.7926220881.

Adding to 64381213 its reverse (31218346), we get a palindrome (95599559).

The spelling of 64381213 in words is "sixty-four million, three hundred eighty-one thousand, two hundred thirteen".