64543212 has 72 divisors (see below), whose sum is σ = 170155440. Its totient is φ = 20603520.

The previous prime is 64543211. The next prime is 64543223. The reversal of 64543212 is 21234546.

64543212 is a `hidden beast` number, since 645 + 4 + 3 + 2 + 12 = 666.

It is a super-3 number, since 3×64543212³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64543211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220138 + ... + 220430.

It is an arithmetic number, because the mean of its divisors is an integer number (2363270).

Almost surely, 2^64543212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64543212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85077720).

64543212 is an abundant number, since it is smaller than the sum of its proper divisors (105612228).

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

64543212 is a wasteful number, since it uses less digits than its factorization.

64543212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 538 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 64543212 is about 8033.8790132787. The cubic root of 64543212 is about 401.1285048645.

Adding to 64543212 its reverse (21234546), we get a palindrome (85777758).

The spelling of 64543212 in words is "sixty-four million, five hundred forty-three thousand, two hundred twelve".