53144340 has 48 divisors (see below), whose sum is σ = 149361408. Its totient is φ = 14118784.

The previous prime is 53144317. The next prime is 53144341. The reversal of 53144340 is 4344135.

53144340 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 53144340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53144341) 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 15 ways as a sum of consecutive naturals, for example, 16069 + ... + 19091.

It is an arithmetic number, because the mean of its divisors is an integer number (3111696).

Almost surely, 2^53144340 is an apocalyptic number.

It is an amenable number.

53144340 is an abundant number, since it is smaller than the sum of its proper divisors (96217068).

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

53144340 is a wasteful number, since it uses less digits than its factorization.

53144340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3326 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 53144340 is about 7290.0164608868. The cubic root of 53144340 is about 375.9692614829.

Adding to 53144340 its reverse (4344135), we get a palindrome (57488475).

The spelling of 53144340 in words is "fifty-three million, one hundred forty-four thousand, three hundred forty".