53144240 has 40 divisors (see below), whose sum is σ = 127826640. Its totient is φ = 20523776.

The previous prime is 53144209. The next prime is 53144251. The reversal of 53144240 is 4244135.

53144240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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, 9134 + ... + 13773.

It is an arithmetic number, because the mean of its divisors is an integer number (3195666).

Almost surely, 2^53144240 is an apocalyptic number.

It is an amenable number.

53144240 is an abundant number, since it is smaller than the sum of its proper divisors (74682400).

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

53144240 is a wasteful number, since it uses less digits than its factorization.

53144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22949 (or 22943 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 53144240 is about 7290.0096021885. The cubic root of 53144240 is about 375.9690256663.

Adding to 53144240 its reverse (4244135), we get a palindrome (57388375).

The spelling of 53144240 in words is "fifty-three million, one hundred forty-four thousand, two hundred forty".