53550621 has 12 divisors (see below), whose sum is σ = 78506272. Its totient is φ = 35167176.

The previous prime is 53550613. The next prime is 53550631. The reversal of 53550621 is 12605535.

53550621 is a `hidden beast` number, since 5 + 35 + 5 + 0 + 621 = 666.

53550621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53550621 - 2³ = 53550613 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 (53550631) 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 11 ways as a sum of consecutive naturals, for example, 43801 + ... + 45006.

Almost surely, 2^53550621 is an apocalyptic number.

It is an amenable number.

53550621 is a deficient number, since it is larger than the sum of its proper divisors (24955651).

53550621 is a wasteful number, since it uses less digits than its factorization.

53550621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88880 (or 88877 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 53550621 is about 7317.8289813305. The cubic root of 53550621 is about 376.9249077080.

The spelling of 53550621 in words is "fifty-three million, five hundred fifty thousand, six hundred twenty-one".