52512809 has 2 divisors, whose sum is σ = 52512810. Its totient is φ = 52512808.

The previous prime is 52512797. The next prime is 52512833. The reversal of 52512809 is 90821525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47997184 + 4515625 = 6928^2 + 2125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52512809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52512869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26256404 + 26256405.

It is an arithmetic number, because the mean of its divisors is an integer number (26256405).

Almost surely, 2^52512809 is an apocalyptic number.

It is an amenable number.

52512809 is a deficient number, since it is larger than the sum of its proper divisors (1).

52512809 is an equidigital number, since it uses as much as digits as its factorization.

52512809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 52512809 is about 7246.5722241623. The cubic root of 52512809 is about 374.4740692549.

The spelling of 52512809 in words is "fifty-two million, five hundred twelve thousand, eight hundred nine".