513155225135121 has 4 divisors (see below), whose sum is σ = 684206966846832. Its totient is φ = 342103483423412.

The previous prime is 513155225135093. The next prime is 513155225135123. The reversal of 513155225135121 is 121531522551315.

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 not a de Polignac number, because 513155225135121 - 2⁵ = 513155225135089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513155225135123) 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, 85525870855851 + ... + 85525870855856.

It is an arithmetic number, because the mean of its divisors is an integer number (171051741711708).

Almost surely, 2^{513155225135121} is an apocalyptic number.

It is an amenable number.

513155225135121 is a deficient number, since it is larger than the sum of its proper divisors (171051741711711).

513155225135121 is a wasteful number, since it uses less digits than its factorization.

513155225135121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171051741711710.

The product of its digits is 225000, while the sum is 42.

Adding to 513155225135121 its reverse (121531522551315), we get a palindrome (634686747686436).

The spelling of 513155225135121 in words is "five hundred thirteen trillion, one hundred fifty-five billion, two hundred twenty-five million, one hundred thirty-five thousand, one hundred twenty-one".