52547309 has 4 divisors (see below), whose sum is σ = 52931004. Its totient is φ = 52163616.

The previous prime is 52547237. The next prime is 52547321. The reversal of 52547309 is 90374525.

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 41344900 + 11202409 = 6430^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 52547309 - 2¹⁶ = 52481773 is a prime.

It is a super-2 number, since 2×52547309² = 5522439366282962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52547329) 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, 191642 + ... + 191915.

It is an arithmetic number, because the mean of its divisors is an integer number (13232751).

Almost surely, 2^52547309 is an apocalyptic number.

It is an amenable number.

52547309 is a deficient number, since it is larger than the sum of its proper divisors (383695).

52547309 is a wasteful number, since it uses less digits than its factorization.

52547309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383694.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 52547309 is about 7248.9522691214. The cubic root of 52547309 is about 374.5560589473.

The spelling of 52547309 in words is "fifty-two million, five hundred forty-seven thousand, three hundred nine".