53533821 has 16 divisors (see below), whose sum is σ = 78062400. Its totient is φ = 32363520.

The previous prime is 53533819. The next prime is 53533841. The reversal of 53533821 is 12833535.

It is not a de Polignac number, because 53533821 - 2¹ = 53533819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53533801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13011 + ... + 16623.

It is an arithmetic number, because the mean of its divisors is an integer number (4878900).

Almost surely, 2^53533821 is an apocalyptic number.

It is an amenable number.

53533821 is a deficient number, since it is larger than the sum of its proper divisors (24528579).

53533821 is a wasteful number, since it uses less digits than its factorization.

53533821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076.

The product of its digits is 10800, while the sum is 30.

The square root of 53533821 is about 7316.6810098569. The cubic root of 53533821 is about 376.8854870586.

The spelling of 53533821 in words is "fifty-three million, five hundred thirty-three thousand, eight hundred twenty-one".