53557504 has 216 divisors, whose sum is σ = 152237120. Its totient is φ = 18247680.

The previous prime is 53557481. The next prime is 53557529. The reversal of 53557504 is 40575535.

It is a self number, because there is not a number n which added to its sum of digits gives 53557504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2818807 + ... + 2818825.

Almost surely, 2^53557504 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 53557504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76118560).

53557504 is an abundant number, since it is smaller than the sum of its proper divisors (98679616).

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

53557504 is a wasteful number, since it uses less digits than its factorization.

53557504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 34.

The square root of 53557504 is about 7318.2992559747. The cubic root of 53557504 is about 376.9410560610.

The spelling of 53557504 in words is "fifty-three million, five hundred fifty-seven thousand, five hundred four".