513000305 has 4 divisors (see below), whose sum is σ = 615600372. Its totient is φ = 410400240.

The previous prime is 513000281. The next prime is 513000337. The reversal of 513000305 is 503000315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503000315 = 5 ⋅100600063.

It can be written as a sum of positive squares in 2 ways, for example, as 187991521 + 325008784 = 13711^2 + 18028^2 .

It is not a de Polignac number, because 513000305 - 2¹⁰ = 512999281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51300026 + ... + 51300035.

It is an arithmetic number, because the mean of its divisors is an integer number (153900093).

Almost surely, 2^513000305 is an apocalyptic number.

It is an amenable number.

513000305 is a deficient number, since it is larger than the sum of its proper divisors (102600067).

513000305 is a wasteful number, since it uses less digits than its factorization.

513000305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102600066.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 513000305 is about 22649.5100388507. The cubic root of 513000305 is about 800.5206532642.

The spelling of 513000305 in words is "five hundred thirteen million, three hundred five", and thus it is an aban number.