513511444013 has 4 divisors (see below), whose sum is σ = 513514068000. Its totient is φ = 513508820028.

The previous prime is 513511443953. The next prime is 513511444057. The reversal of 513511444013 is 310444115315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513511444013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513511444513) 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, 992513 + ... + 1418486.

It is an arithmetic number, because the mean of its divisors is an integer number (128378517000).

Almost surely, 2^513511444013 is an apocalyptic number.

It is an amenable number.

513511444013 is a deficient number, since it is larger than the sum of its proper divisors (2623987).

513511444013 is a wasteful number, since it uses less digits than its factorization.

513511444013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623986.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 513511444013 its reverse (310444115315), we get a palindrome (823955559328).

The spelling of 513511444013 in words is "five hundred thirteen billion, five hundred eleven million, four hundred forty-four thousand, thirteen".