53256621 has 16 divisors (see below), whose sum is σ = 78338880. Its totient is φ = 31912320.

The previous prime is 53256583. The next prime is 53256629. The reversal of 53256621 is 12665235.

53256621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-53256621 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 (53256629) 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 15 ways as a sum of consecutive naturals, for example, 6130 + ... + 12003.

It is an arithmetic number, because the mean of its divisors is an integer number (4896180).

Almost surely, 2^53256621 is an apocalyptic number.

It is an amenable number.

53256621 is a deficient number, since it is larger than the sum of its proper divisors (25082259).

53256621 is a wasteful number, since it uses less digits than its factorization.

53256621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18236.

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

The square root of 53256621 is about 7297.7134090070. The cubic root of 53256621 is about 376.2338522814.

The spelling of 53256621 in words is "fifty-three million, two hundred fifty-six thousand, six hundred twenty-one".