53521636 has 24 divisors (see below), whose sum is σ = 107198336. Its totient is φ = 22904640.

The previous prime is 53521619. The next prime is 53521681. The reversal of 53521636 is 63612535.

It is a junction number, because it is equal to n+sod(n) for n = 53521598 and 53521607.

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, 36265 + ... + 37711.

Almost surely, 2^53521636 is an apocalyptic number.

It is an amenable number.

53521636 is an abundant number, since it is smaller than the sum of its proper divisors (53676700).

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

53521636 is a wasteful number, since it uses less digits than its factorization.

53521636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779 (or 2777 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 53521636 is about 7315.8482761741. The cubic root of 53521636 is about 376.8568901950.

The spelling of 53521636 in words is "fifty-three million, five hundred twenty-one thousand, six hundred thirty-six".