53502561 has 18 divisors (see below), whose sum is σ = 89899602. Its totient is φ = 30572640.

The previous prime is 53502539. The next prime is 53502571. The reversal of 53502561 is 16520535.

53502561 is a `hidden beast` number, since 53 + 50 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50680161 + 2822400 = 7119^2 + 1680^2 .

It is not a de Polignac number, because 53502561 - 2¹⁰ = 53501537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53502521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60220 + ... + 61101.

Almost surely, 2^53502561 is an apocalyptic number.

It is an amenable number.

53502561 is a deficient number, since it is larger than the sum of its proper divisors (36397041).

53502561 is a wasteful number, since it uses less digits than its factorization.

53502561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121341 (or 121331 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 53502561 is about 7314.5444834248. The cubic root of 53502561 is about 376.8121145374.

The spelling of 53502561 in words is "fifty-three million, five hundred two thousand, five hundred sixty-one".