513513241523 has 4 divisors (see below), whose sum is σ = 513515568720. Its totient is φ = 513510914328.

The previous prime is 513513241499. The next prime is 513513241531. The reversal of 513513241523 is 325142315315.

It is a happy number.

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 513513241523 - 2¹² = 513513237427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513513241123) 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, 793340 + ... + 1287017.

It is an arithmetic number, because the mean of its divisors is an integer number (128378892180).

Almost surely, 2^513513241523 is an apocalyptic number.

513513241523 is a deficient number, since it is larger than the sum of its proper divisors (2327197).

513513241523 is a wasteful number, since it uses less digits than its factorization.

513513241523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327196.

The product of its digits is 54000, while the sum is 35.

Adding to 513513241523 its reverse (325142315315), we get a palindrome (838655556838).

The spelling of 513513241523 in words is "five hundred thirteen billion, five hundred thirteen million, two hundred forty-one thousand, five hundred twenty-three".