513030509 has 4 divisors (see below), whose sum is σ = 517570716. Its totient is φ = 508490304.

The previous prime is 513030491. The next prime is 513030569. The reversal of 513030509 is 905030315.

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 28590409 + 484440100 = 5347^2 + 22010^2 .

It is a cyclic number.

It is not a de Polignac number, because 513030509 - 2¹² = 513026413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513030569) 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, 2269934 + ... + 2270159.

It is an arithmetic number, because the mean of its divisors is an integer number (129392679).

Almost surely, 2^513030509 is an apocalyptic number.

It is an amenable number.

513030509 is a deficient number, since it is larger than the sum of its proper divisors (4540207).

513030509 is a wasteful number, since it uses less digits than its factorization.

513030509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540206.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 513030509 is about 22650.1767984270. The cubic root of 513030509 is about 800.5363637495.

The spelling of 513030509 in words is "five hundred thirteen million, thirty thousand, five hundred nine".