52756813 has 4 divisors (see below), whose sum is σ = 52800700. Its totient is φ = 52712928.

The previous prime is 52756807. The next prime is 52756817. The reversal of 52756813 is 31865725.

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 36216324 + 16540489 = 6018^2 + 4067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52756813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52756817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20088 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (13200175).

Almost surely, 2^52756813 is an apocalyptic number.

It is an amenable number.

52756813 is a deficient number, since it is larger than the sum of its proper divisors (43887).

52756813 is a wasteful number, since it uses less digits than its factorization.

52756813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43886.

The product of its digits is 50400, while the sum is 37.

The square root of 52756813 is about 7263.3885342862. The cubic root of 52756813 is about 375.0531788287.

The spelling of 52756813 in words is "fifty-two million, seven hundred fifty-six thousand, eight hundred thirteen".