53565891 has 8 divisors (see below), whose sum is σ = 71894784. Its totient is φ = 35473800.

The previous prime is 53565877. The next prime is 53565901. The reversal of 53565891 is 19856535.

53565891 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 not a de Polignac number, because 53565891 - 2¹¹ = 53563843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53565821) 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, 58671 + ... + 59576.

It is an arithmetic number, because the mean of its divisors is an integer number (8986848).

Almost surely, 2^53565891 is an apocalyptic number.

53565891 is a deficient number, since it is larger than the sum of its proper divisors (18328893).

53565891 is a wasteful number, since it uses less digits than its factorization.

53565891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118401.

The product of its digits is 162000, while the sum is 42.

The square root of 53565891 is about 7318.8722491925. The cubic root of 53565891 is about 376.9607311105.

The spelling of 53565891 in words is "fifty-three million, five hundred sixty-five thousand, eight hundred ninety-one".