53243520 has 128 divisors (see below), whose sum is σ = 185215680. Its totient is φ = 12902400.

The previous prime is 53243501. The next prime is 53243537. The reversal of 53243520 is 2534235.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19860 + ... + 22380.

Almost surely, 2^53243520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92607840).

53243520 is an abundant number, since it is smaller than the sum of its proper divisors (131972160).

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

53243520 is a wasteful number, since it uses less digits than its factorization.

53243520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 53243520 is about 7296.8157438707. The cubic root of 53243520 is about 376.2029988786.

Adding to 53243520 its reverse (2534235), we get a palindrome (55777755).

The spelling of 53243520 in words is "fifty-three million, two hundred forty-three thousand, five hundred twenty".