53003520 has 216 divisors, whose sum is σ = 189405216. Its totient is φ = 13676544.

The previous prime is 53003507. The next prime is 53003527. The reversal of 53003520 is 2530035.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53003493 and 53003502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53003527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495307 + ... + 495413.

It is an arithmetic number, because the mean of its divisors is an integer number (876876).

Almost surely, 2^53003520 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 53003520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94702608).

53003520 is an abundant number, since it is smaller than the sum of its proper divisors (136401696).

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

53003520 is a wasteful number, since it uses less digits than its factorization.

53003520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 53003520 is about 7280.3516398592. The cubic root of 53003520 is about 375.6368910404.

Adding to 53003520 its reverse (2530035), we get a palindrome (55533555).

The spelling of 53003520 in words is "fifty-three million, three thousand, five hundred twenty".