53143636 has 36 divisors (see below), whose sum is σ = 116512788. Its totient is φ = 21022848.

The previous prime is 53143567. The next prime is 53143637. The reversal of 53143636 is 63634135.

It can be written as a sum of positive squares in 2 ways, for example, as 32947600 + 20196036 = 5740^2 + 4494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53143598 and 53143607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53143637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7881 + ... + 12976.

Almost surely, 2^53143636 is an apocalyptic number.

It is an amenable number.

53143636 is an abundant number, since it is smaller than the sum of its proper divisors (63369152).

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

53143636 is a wasteful number, since it uses less digits than its factorization.

53143636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20888 (or 20879 counting only the distinct ones).

The product of its digits is 19440, while the sum is 31.

The square root of 53143636 is about 7289.9681755135. The cubic root of 53143636 is about 375.9676013279.

The spelling of 53143636 in words is "fifty-three million, one hundred forty-three thousand, six hundred thirty-six".