53557506 has 12 divisors (see below), whose sum is σ = 116041302. Its totient is φ = 17852496.

The previous prime is 53557481. The next prime is 53557529. The reversal of 53557506 is 60575535.

53557506 is a `hidden beast` number, since 53 + 557 + 50 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 194481 = 7305^2 + 441^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1487691 + ... + 1487726.

Almost surely, 2^53557506 is an apocalyptic number.

53557506 is an abundant number, since it is smaller than the sum of its proper divisors (62483796).

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

53557506 is a wasteful number, since it uses less digits than its factorization.

53557506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975425 (or 2975422 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The square root of 53557506 is about 7318.2993926185. The cubic root of 53557506 is about 376.9410607530.

The spelling of 53557506 in words is "fifty-three million, five hundred fifty-seven thousand, five hundred six".