513113305 has 4 divisors (see below), whose sum is σ = 615735972. Its totient is φ = 410490640.

The previous prime is 513113303. The next prime is 513113311. The reversal of 513113305 is 503311315.

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 82011136 + 431102169 = 9056^2 + 20763^2 .

It is not a de Polignac number, because 513113305 - 2¹ = 513113303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513113303) 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, 51311326 + ... + 51311335.

It is an arithmetic number, because the mean of its divisors is an integer number (153933993).

Almost surely, 2^513113305 is an apocalyptic number.

It is an amenable number.

513113305 is a deficient number, since it is larger than the sum of its proper divisors (102622667).

513113305 is a wasteful number, since it uses less digits than its factorization.

513113305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102622666.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 513113305 is about 22652.0044366939. The cubic root of 513113305 is about 800.5794265839.

The spelling of 513113305 in words is "five hundred thirteen million, one hundred thirteen thousand, three hundred five".