53143240 has 32 divisors (see below), whose sum is σ = 121020480. Its totient is φ = 20999872.

The previous prime is 53143219. The next prime is 53143243. The reversal of 53143240 is 4234135.

53143240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (53143243) 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 7 ways as a sum of consecutive naturals, for example, 4684 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (3781890).

Almost surely, 2^53143240 is an apocalyptic number.

It is an amenable number.

53143240 is an abundant number, since it is smaller than the sum of its proper divisors (67877240).

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

53143240 is a wasteful number, since it uses less digits than its factorization.

53143240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101 (or 16097 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 53143240 is about 7289.9410148505. The cubic root of 53143240 is about 375.9666674843.

Adding to 53143240 its reverse (4234135), we get a palindrome (57377375).

The spelling of 53143240 in words is "fifty-three million, one hundred forty-three thousand, two hundred forty".