53547921 has 12 divisors (see below), whose sum is σ = 88396672. Its totient is φ = 30598776.

The previous prime is 53547919. The next prime is 53547971. The reversal of 53547921 is 12974535.

It is not a de Polignac number, because 53547921 - 2¹ = 53547919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53547911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424921 + ... + 425046.

Almost surely, 2^53547921 is an apocalyptic number.

It is an amenable number.

53547921 is a deficient number, since it is larger than the sum of its proper divisors (34848751).

53547921 is a wasteful number, since it uses less digits than its factorization.

53547921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849980 (or 849977 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 53547921 is about 7317.6444980608. The cubic root of 53547921 is about 376.9185728026.

The spelling of 53547921 in words is "fifty-three million, five hundred forty-seven thousand, nine hundred twenty-one".