64213312 has 28 divisors (see below), whose sum is σ = 134132320. Its totient is φ = 30416256.

The previous prime is 64213283. The next prime is 64213313. The reversal of 64213312 is 21331246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64213313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25188 + ... + 27619.

It is an arithmetic number, because the mean of its divisors is an integer number (4790440).

Almost surely, 2^64213312 is an apocalyptic number.

It is an amenable number.

64213312 is an abundant number, since it is smaller than the sum of its proper divisors (69919008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64213312 is a wasteful number, since it uses less digits than its factorization.

64213312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52838 (or 52828 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 64213312 is about 8013.3209095855. The cubic root of 64213312 is about 400.4439071838.

Adding to 64213312 its reverse (21331246), we get a palindrome (85544558).

The spelling of 64213312 in words is "sixty-four million, two hundred thirteen thousand, three hundred twelve".