513205206025 has 6 divisors (see below), whose sum is σ = 636374455502. Its totient is φ = 410564164800.

The previous prime is 513205206011. The next prime is 513205206053. The reversal of 513205206025 is 520602502315.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10461812089 + 502743393936 = 102283^2 + 709044^2 .

It is a de Polignac number, because none of the positive numbers 2^k-513205206025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10264104096 + ... + 10264104145.

Almost surely, 2^513205206025 is an apocalyptic number.

It is an amenable number.

513205206025 is a deficient number, since it is larger than the sum of its proper divisors (123169249477).

513205206025 is a wasteful number, since it uses less digits than its factorization.

513205206025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20528208251 (or 20528208246 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 513205206025 in words is "five hundred thirteen billion, two hundred five million, two hundred six thousand, twenty-five".