64221152 has 24 divisors (see below), whose sum is σ = 131934096. Its totient is φ = 30714112.

The previous prime is 64221139. The next prime is 64221163. The reversal of 64221152 is 25112246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42893 + ... + 44364.

It is an arithmetic number, because the mean of its divisors is an integer number (5497254).

Almost surely, 2^64221152 is an apocalyptic number.

It is an amenable number.

64221152 is an abundant number, since it is smaller than the sum of its proper divisors (67712944).

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

64221152 is a wasteful number, since it uses less digits than its factorization.

64221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87290 (or 87282 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 64221152 is about 8013.8100801055. The cubic root of 64221152 is about 400.4602036618.

Adding to 64221152 its reverse (25112246), we get a palindrome (89333398).

The spelling of 64221152 in words is "sixty-four million, two hundred twenty-one thousand, one hundred fifty-two".