513112503 has 4 divisors (see below), whose sum is σ = 684150008. Its totient is φ = 342075000.

The previous prime is 513112477. The next prime is 513112511. The reversal of 513112503 is 305211315.

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

It is not a de Polignac number, because 513112503 - 2⁵ = 513112471 is a prime.

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 513112503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513112553) 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, 85518748 + ... + 85518753.

It is an arithmetic number, because the mean of its divisors is an integer number (171037502).

Almost surely, 2^513112503 is an apocalyptic number.

513112503 is a deficient number, since it is larger than the sum of its proper divisors (171037505).

513112503 is a wasteful number, since it uses less digits than its factorization.

513112503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171037504.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 513112503 is about 22651.9867340593. The cubic root of 513112503 is about 800.5790094798.

Adding to 513112503 its reverse (305211315), we get a palindrome (818323818).

The spelling of 513112503 in words is "five hundred thirteen million, one hundred twelve thousand, five hundred three".