53003540 has 24 divisors (see below), whose sum is σ = 117166560. Its totient is φ = 20085408.

The previous prime is 53003527. The next prime is 53003591. The reversal of 53003540 is 4530035.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69362 + ... + 70121.

It is an arithmetic number, because the mean of its divisors is an integer number (4881940).

Almost surely, 2^53003540 is an apocalyptic number.

It is an amenable number.

53003540 is an abundant number, since it is smaller than the sum of its proper divisors (64163020).

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

53003540 is a wasteful number, since it uses less digits than its factorization.

53003540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139511 (or 139509 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 53003540 is about 7280.3530134191. The cubic root of 53003540 is about 375.6369382872.

Adding to 53003540 its reverse (4530035), we get a palindrome (57533575).

The spelling of 53003540 in words is "fifty-three million, three thousand, five hundred forty".