513242617 has 4 divisors (see below), whose sum is σ = 518533876. Its totient is φ = 507951360.

The previous prime is 513242591. The next prime is 513242669. The reversal of 513242617 is 716242315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 716242315 = 5 ⋅143248463.

It can be written as a sum of positive squares in 2 ways, for example, as 321807721 + 191434896 = 17939^2 + 13836^2 .

It is a cyclic number.

It is not a de Polignac number, because 513242617 - 2¹⁵ = 513209849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513242017) 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, 2645484 + ... + 2645677.

It is an arithmetic number, because the mean of its divisors is an integer number (129633469).

Almost surely, 2^513242617 is an apocalyptic number.

It is an amenable number.

513242617 is a deficient number, since it is larger than the sum of its proper divisors (5291259).

513242617 is an equidigital number, since it uses as much as digits as its factorization.

513242617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291258.

The product of its digits is 10080, while the sum is 31.

The square root of 513242617 is about 22654.8585738247. The cubic root of 513242617 is about 800.6466734801.

The spelling of 513242617 in words is "five hundred thirteen million, two hundred forty-two thousand, six hundred seventeen".