53806521 has 8 divisors (see below), whose sum is σ = 71930880. Its totient is φ = 35776592.

The previous prime is 53806481. The next prime is 53806541. The reversal of 53806521 is 12560835.

53806521 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 a cyclic number.

It is not a de Polignac number, because 53806521 - 2⁹ = 53806009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53806541) 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, 22266 + ... + 24563.

It is an arithmetic number, because the mean of its divisors is an integer number (8991360).

Almost surely, 2^53806521 is an apocalyptic number.

It is an amenable number.

53806521 is a deficient number, since it is larger than the sum of its proper divisors (18124359).

53806521 is a wasteful number, since it uses less digits than its factorization.

53806521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47215.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 53806521 is about 7335.2928366903. The cubic root of 53806521 is about 377.5243520393.

The spelling of 53806521 in words is "fifty-three million, eight hundred six thousand, five hundred twenty-one".