513440311520243 has 4 divisors (see below), whose sum is σ = 525963245947608. Its totient is φ = 500917377092880.

The previous prime is 513440311520239. The next prime is 513440311520281. The reversal of 513440311520243 is 342025113044315.

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 513440311520243 - 2² = 513440311520239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513440311520197 and 513440311520206.

It is not an unprimeable number, because it can be changed into a prime (513440311520443) 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, 6261467213621 + ... + 6261467213702.

It is an arithmetic number, because the mean of its divisors is an integer number (131490811486902).

Almost surely, 2^{513440311520243} is an apocalyptic number.

513440311520243 is a deficient number, since it is larger than the sum of its proper divisors (12522934427365).

513440311520243 is a wasteful number, since it uses less digits than its factorization.

513440311520243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12522934427364.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 513440311520243 its reverse (342025113044315), we get a palindrome (855465424564558).

The spelling of 513440311520243 in words is "five hundred thirteen trillion, four hundred forty billion, three hundred eleven million, five hundred twenty thousand, two hundred forty-three".