513015445121 has 4 divisors (see below), whose sum is σ = 524946036912. Its totient is φ = 501084853332.

The previous prime is 513015445099. The next prime is 513015445123. The reversal of 513015445121 is 121544510315.

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 de Polignac number, because none of the positive numbers 2^k-513015445121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513015445123) 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, 5965295831 + ... + 5965295916.

It is an arithmetic number, because the mean of its divisors is an integer number (131236509228).

Almost surely, 2^513015445121 is an apocalyptic number.

It is an amenable number.

513015445121 is a deficient number, since it is larger than the sum of its proper divisors (11930591791).

513015445121 is a wasteful number, since it uses less digits than its factorization.

513015445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11930591790.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 513015445121 its reverse (121544510315), we get a palindrome (634559955436).

The spelling of 513015445121 in words is "five hundred thirteen billion, fifteen million, four hundred forty-five thousand, one hundred twenty-one".