513714521 has 4 divisors (see below), whose sum is σ = 513868452. Its totient is φ = 513560592.

The previous prime is 513714491. The next prime is 513714541. The reversal of 513714521 is 125417315.

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 489073225 + 24641296 = 22115^2 + 4964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513714521 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 (513714541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71846 + ... + 78671.

It is an arithmetic number, because the mean of its divisors is an integer number (128467113).

Almost surely, 2^513714521 is an apocalyptic number.

It is an amenable number.

513714521 is a deficient number, since it is larger than the sum of its proper divisors (153931).

513714521 is a wasteful number, since it uses less digits than its factorization.

513714521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153930.

The product of its digits is 4200, while the sum is 29.

The square root of 513714521 is about 22665.2712536162. The cubic root of 513714521 is about 800.8919847718.

The spelling of 513714521 in words is "five hundred thirteen million, seven hundred fourteen thousand, five hundred twenty-one".