53503520 has 192 divisors, whose sum is σ = 157925376. Its totient is φ = 16727040.

The previous prime is 53503519. The next prime is 53503523. The reversal of 53503520 is 2530535.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (53503523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798527 + ... + 798593.

It is an arithmetic number, because the mean of its divisors is an integer number (822528).

Almost surely, 2^53503520 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 53503520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78962688).

53503520 is an abundant number, since it is smaller than the sum of its proper divisors (104421856).

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

53503520 is a wasteful number, since it uses less digits than its factorization.

53503520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 53503520 is about 7314.6100374524. The cubic root of 53503520 is about 376.8143658979.

The spelling of 53503520 in words is "fifty-three million, five hundred three thousand, five hundred twenty".