64431252 has 36 divisors (see below), whose sum is σ = 165945780. Its totient is φ = 21071232.

The previous prime is 64431251. The next prime is 64431277. The reversal of 64431252 is 25213446.

64431252 is a `hidden beast` number, since 644 + 3 + 12 + 5 + 2 = 666.

64431252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50637456 + 13793796 = 7116^2 + 3714^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64431251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14977 + ... + 18792.

It is an arithmetic number, because the mean of its divisors is an integer number (4609605).

Almost surely, 2^64431252 is an apocalyptic number.

It is an amenable number.

64431252 is an abundant number, since it is smaller than the sum of its proper divisors (101514528).

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

64431252 is a wasteful number, since it uses less digits than its factorization.

64431252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33832 (or 33827 counting only the distinct ones).

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

The square root of 64431252 is about 8026.9079974795. The cubic root of 64431252 is about 400.8964311937.

Adding to 64431252 its reverse (25213446), we get a palindrome (89644698).

The spelling of 64431252 in words is "sixty-four million, four hundred thirty-one thousand, two hundred fifty-two".