513662631243 has 4 divisors (see below), whose sum is σ = 684883508328. Its totient is φ = 342441754160.

The previous prime is 513662631239. The next prime is 513662631259. The reversal of 513662631243 is 342136266315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513662631243 - 2² = 513662631239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513662631195 and 513662631204.

It is not an unprimeable number, because it can be changed into a prime (513662631203) 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, 85610438538 + ... + 85610438543.

It is an arithmetic number, because the mean of its divisors is an integer number (171220877082).

Almost surely, 2^513662631243 is an apocalyptic number.

513662631243 is a deficient number, since it is larger than the sum of its proper divisors (171220877085).

513662631243 is a wasteful number, since it uses less digits than its factorization.

513662631243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171220877084.

The product of its digits is 466560, while the sum is 42.

Adding to 513662631243 its reverse (342136266315), we get a palindrome (855798897558).

The spelling of 513662631243 in words is "five hundred thirteen billion, six hundred sixty-two million, six hundred thirty-one thousand, two hundred forty-three".