513252209 has 4 divisors (see below), whose sum is σ = 514237860. Its totient is φ = 512266560.

The previous prime is 513252191. The next prime is 513252217. The reversal of 513252209 is 902252315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902252315 = 5 ⋅180450463.

It can be written as a sum of positive squares in 2 ways, for example, as 48720400 + 464531809 = 6980^2 + 21553^2 .

It is a cyclic number.

It is not a de Polignac number, because 513252209 - 2¹⁶ = 513186673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513252239) 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, 492044 + ... + 493085.

It is an arithmetic number, because the mean of its divisors is an integer number (128559465).

Almost surely, 2^513252209 is an apocalyptic number.

It is an amenable number.

513252209 is a deficient number, since it is larger than the sum of its proper divisors (985651).

513252209 is an equidigital number, since it uses as much as digits as its factorization.

513252209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985650.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 513252209 is about 22655.0702713543. The cubic root of 513252209 is about 800.6516612154.

The spelling of 513252209 in words is "five hundred thirteen million, two hundred fifty-two thousand, two hundred nine".