53721633 has 8 divisors (see below), whose sum is σ = 81861568. Its totient is φ = 30698064.

The previous prime is 53721599. The next prime is 53721637. The reversal of 53721633 is 33612735.

53721633 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 53721633 - 2⁹ = 53721121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53721633.

It is not an unprimeable number, because it can be changed into a prime (53721637) 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, 1279066 + ... + 1279107.

It is an arithmetic number, because the mean of its divisors is an integer number (10232696).

Almost surely, 2^53721633 is an apocalyptic number.

It is an amenable number.

53721633 is a deficient number, since it is larger than the sum of its proper divisors (28139935).

53721633 is a wasteful number, since it uses less digits than its factorization.

53721633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558183.

The product of its digits is 11340, while the sum is 30.

The square root of 53721633 is about 7329.5042806455. The cubic root of 53721633 is about 377.3257134446.

The spelling of 53721633 in words is "fifty-three million, seven hundred twenty-one thousand, six hundred thirty-three".