64213447 has 8 divisors (see below), whose sum is σ = 67102560. Its totient is φ = 61332480.

The previous prime is 64213441. The next prime is 64213451. The reversal of 64213447 is 74431246.

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 64213447 - 2³ = 64213439 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 (64213441) 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, 18679 + ... + 21847.

It is an arithmetic number, because the mean of its divisors is an integer number (8387820).

Almost surely, 2^64213447 is an apocalyptic number.

64213447 is a deficient number, since it is larger than the sum of its proper divisors (2889113).

64213447 is a wasteful number, since it uses less digits than its factorization.

64213447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073.

The product of its digits is 16128, while the sum is 31.

The square root of 64213447 is about 8013.3293330550. The cubic root of 64213447 is about 400.4441878104. Note that the first 3 decimals are identical.

The spelling of 64213447 in words is "sixty-four million, two hundred thirteen thousand, four hundred forty-seven".