52015609 has 4 divisors (see below), whose sum is σ = 52163316. Its totient is φ = 51867904.

The previous prime is 52015591. The next prime is 52015637. The reversal of 52015609 is 90651025.

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 8982009 + 43033600 = 2997^2 + 6560^2 .

It is a cyclic number.

It is not a de Polignac number, because 52015609 - 2¹⁷ = 51884537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52015669) 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, 73324 + ... + 74029.

It is an arithmetic number, because the mean of its divisors is an integer number (13040829).

Almost surely, 2^52015609 is an apocalyptic number.

It is an amenable number.

52015609 is a deficient number, since it is larger than the sum of its proper divisors (147707).

52015609 is a wasteful number, since it uses less digits than its factorization.

52015609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147706.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 52015609 is about 7212.1847591420. The cubic root of 52015609 is about 373.2884585908.

It can be divided in two parts, 520 and 15609, that added together give a square (16129 = 127²).

The spelling of 52015609 in words is "fifty-two million, fifteen thousand, six hundred nine".