53003823821 has 16 divisors (see below), whose sum is σ = 58071444480. Its totient is φ = 48083868480.

The previous prime is 53003823811. The next prime is 53003823869. The reversal of 53003823821 is 12832830035.

53003823821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 53003823821 - 2¹⁰ = 53003822797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53003823811) 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, 77495 + ... + 334683.

It is an arithmetic number, because the mean of its divisors is an integer number (3629465280).

Almost surely, 2^53003823821 is an apocalyptic number.

It is an amenable number.

53003823821 is a deficient number, since it is larger than the sum of its proper divisors (5067620659).

53003823821 is a wasteful number, since it uses less digits than its factorization.

53003823821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257476.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 53003823821 in words is "fifty-three billion, three million, eight hundred twenty-three thousand, eight hundred twenty-one".