513165453523 has 4 divisors (see below), whose sum is σ = 514505311488. Its totient is φ = 511825595560.

The previous prime is 513165453473. The next prime is 513165453529. The reversal of 513165453523 is 325354561315.

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 513165453523 - 2⁹ = 513165453011 is a prime.

It is a super-2 number, since 2×513165453523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513165453523.

It is not an unprimeable number, because it can be changed into a prime (513165453529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669928408 + ... + 669929173.

It is an arithmetic number, because the mean of its divisors is an integer number (128626327872).

Almost surely, 2^513165453523 is an apocalyptic number.

513165453523 is a deficient number, since it is larger than the sum of its proper divisors (1339857965).

513165453523 is a wasteful number, since it uses less digits than its factorization.

513165453523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339857964.

The product of its digits is 810000, while the sum is 43.

The spelling of 513165453523 in words is "five hundred thirteen billion, one hundred sixty-five million, four hundred fifty-three thousand, five hundred twenty-three".