53621543 has 4 divisors (see below), whose sum is σ = 54376848. Its totient is φ = 52866240.

The previous prime is 53621539. The next prime is 53621549. The reversal of 53621543 is 34512635.

53621543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53621543 - 2² = 53621539 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 (53621549) 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 3 ways as a sum of consecutive naturals, for example, 377546 + ... + 377687.

It is an arithmetic number, because the mean of its divisors is an integer number (13594212).

Almost surely, 2^53621543 is an apocalyptic number.

53621543 is a deficient number, since it is larger than the sum of its proper divisors (755305).

53621543 is an equidigital number, since it uses as much as digits as its factorization.

53621543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755304.

The product of its digits is 10800, while the sum is 29.

The square root of 53621543 is about 7322.6732140660. The cubic root of 53621543 is about 377.0912330474.

The spelling of 53621543 in words is "fifty-three million, six hundred twenty-one thousand, five hundred forty-three".