52131565 has 4 divisors (see below), whose sum is σ = 62557884. Its totient is φ = 41705248.

The previous prime is 52131551. The next prime is 52131587. The reversal of 52131565 is 56513125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20016676 + 32114889 = 4474^2 + 5667^2 .

It is a cyclic number.

It is not a de Polignac number, because 52131565 - 2²³ = 43742957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5213152 + ... + 5213161.

It is an arithmetic number, because the mean of its divisors is an integer number (15639471).

Almost surely, 2^52131565 is an apocalyptic number.

It is an amenable number.

52131565 is a deficient number, since it is larger than the sum of its proper divisors (10426319).

52131565 is a wasteful number, since it uses less digits than its factorization.

52131565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426318.

The product of its digits is 4500, while the sum is 28.

The square root of 52131565 is about 7220.2191794986. The cubic root of 52131565 is about 373.5656376445.

The spelling of 52131565 in words is "fifty-two million, one hundred thirty-one thousand, five hundred sixty-five".