52731561 has 8 divisors (see below), whose sum is σ = 70845984. Its totient is φ = 34885760.

The previous prime is 52731463. The next prime is 52731577. The reversal of 52731561 is 16513725.

52731561 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 52731561 - 2¹⁰ = 52730537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52731461) 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, 66696 + ... + 67481.

It is an arithmetic number, because the mean of its divisors is an integer number (8855748).

Almost surely, 2^52731561 is an apocalyptic number.

It is an amenable number.

52731561 is a deficient number, since it is larger than the sum of its proper divisors (18114423).

52731561 is a wasteful number, since it uses less digits than its factorization.

52731561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134311.

The product of its digits is 6300, while the sum is 30.

The square root of 52731561 is about 7261.6500191072. The cubic root of 52731561 is about 374.9933296591.

The spelling of 52731561 in words is "fifty-two million, seven hundred thirty-one thousand, five hundred sixty-one".