53205609 has 4 divisors (see below), whose sum is σ = 70940816. Its totient is φ = 35470404.

The previous prime is 53205589. The next prime is 53205611. The reversal of 53205609 is 90650235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53205609 - 2¹⁵ = 53172841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53205619) 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, 8867599 + ... + 8867604.

It is an arithmetic number, because the mean of its divisors is an integer number (17735204).

Almost surely, 2^53205609 is an apocalyptic number.

It is an amenable number.

53205609 is a deficient number, since it is larger than the sum of its proper divisors (17735207).

53205609 is a wasteful number, since it uses less digits than its factorization.

53205609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17735206.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 53205609 is about 7294.2175042975. The cubic root of 53205609 is about 376.1136883655.

The spelling of 53205609 in words is "fifty-three million, two hundred five thousand, six hundred nine".