64531140 has 24 divisors (see below), whose sum is σ = 180687360. Its totient is φ = 17208288.

The previous prime is 64531109. The next prime is 64531151. The reversal of 64531140 is 4113546.

64531140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64531140.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 537700 + ... + 537819.

It is an arithmetic number, because the mean of its divisors is an integer number (7528640).

Almost surely, 2^64531140 is an apocalyptic number.

64531140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64531140 is an abundant number, since it is smaller than the sum of its proper divisors (116156220).

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

64531140 is a wasteful number, since it uses less digits than its factorization.

64531140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075531 (or 1075529 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 64531140 is about 8033.1276598844. The cubic root of 64531140 is about 401.1034946163.

Adding to 64531140 its reverse (4113546), we get a palindrome (68644686).

The spelling of 64531140 in words is "sixty-four million, five hundred thirty-one thousand, one hundred forty".