53903821 has 8 divisors (see below), whose sum is σ = 57317760. Its totient is φ = 50516928.

The previous prime is 53903813. The next prime is 53903827. The reversal of 53903821 is 12830935.

It is a happy number.

53903821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53903821 - 2³ = 53903813 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 (53903827) 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 7 ways as a sum of consecutive naturals, for example, 2571 + ... + 10696.

It is an arithmetic number, because the mean of its divisors is an integer number (7164720).

Almost surely, 2^53903821 is an apocalyptic number.

It is an amenable number.

53903821 is a deficient number, since it is larger than the sum of its proper divisors (3413939).

53903821 is a wasteful number, since it uses less digits than its factorization.

53903821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13523.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 53903821 is about 7341.9221597617. The cubic root of 53903821 is about 377.7517780037.

The spelling of 53903821 in words is "fifty-three million, nine hundred three thousand, eight hundred twenty-one".