53730561 has 4 divisors (see below), whose sum is σ = 71640752. Its totient is φ = 35820372.

The previous prime is 53730539. The next prime is 53730563. The reversal of 53730561 is 16503735.

53730561 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53730561 - 2⁷ = 53730433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53730563) 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, 8955091 + ... + 8955096.

It is an arithmetic number, because the mean of its divisors is an integer number (17910188).

Almost surely, 2^53730561 is an apocalyptic number.

It is an amenable number.

53730561 is a deficient number, since it is larger than the sum of its proper divisors (17910191).

53730561 is a wasteful number, since it uses less digits than its factorization.

53730561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17910190.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 53730561 is about 7330.1133006250. The cubic root of 53730561 is about 377.3466148778.

The spelling of 53730561 in words is "fifty-three million, seven hundred thirty thousand, five hundred sixty-one".