53623521 has 24 divisors (see below), whose sum is σ = 91380224. Its totient is φ = 29652480.

The previous prime is 53623519. The next prime is 53623543. The reversal of 53623521 is 12532635.

53623521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53623521 - 2¹ = 53623519 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53623421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11776 + ... + 15681.

Almost surely, 2^53623521 is an apocalyptic number.

It is an amenable number.

53623521 is a deficient number, since it is larger than the sum of its proper divisors (37756703).

53623521 is a wasteful number, since it uses less digits than its factorization.

53623521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27501 (or 27498 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 53623521 is about 7322.8082727872. The cubic root of 53623521 is about 377.0958697242.

The spelling of 53623521 in words is "fifty-three million, six hundred twenty-three thousand, five hundred twenty-one".