512311440503 has 4 divisors (see below), whose sum is σ = 512385706200. Its totient is φ = 512237174808.

The previous prime is 512311440341. The next prime is 512311440517. The reversal of 512311440503 is 305044113215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512311440503 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 (512311440523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37122500 + ... + 37136297.

It is an arithmetic number, because the mean of its divisors is an integer number (128096426550).

Almost surely, 2^512311440503 is an apocalyptic number.

512311440503 is a deficient number, since it is larger than the sum of its proper divisors (74265697).

512311440503 is an equidigital number, since it uses as much as digits as its factorization.

512311440503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74265696.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 512311440503 its reverse (305044113215), we get a palindrome (817355553718).

The spelling of 512311440503 in words is "five hundred twelve billion, three hundred eleven million, four hundred forty thousand, five hundred three".