64021212 has 48 divisors (see below), whose sum is σ = 171712800. Its totient is φ = 20603520.

The previous prime is 64021189. The next prime is 64021229. The reversal of 64021212 is 21212046.

64021212 is a `hidden beast` number, since 640 + 2 + 1 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7089 + ... + 13352.

It is an arithmetic number, because the mean of its divisors is an integer number (3577350).

Almost surely, 2^64021212 is an apocalyptic number.

It is an amenable number.

64021212 is an abundant number, since it is smaller than the sum of its proper divisors (107691588).

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

64021212 is a wasteful number, since it uses less digits than its factorization.

64021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20483 (or 20475 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 64021212 is about 8001.3256401674. The cubic root of 64021212 is about 400.0441867853.

Adding to 64021212 its reverse (21212046), we get a palindrome (85233258).

The spelling of 64021212 in words is "sixty-four million, twenty-one thousand, two hundred twelve".