513552303523 has 4 divisors (see below), whose sum is σ = 586916918320. Its totient is φ = 440187688728.

The previous prime is 513552303469. The next prime is 513552303541. The reversal of 513552303523 is 325303255315.

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 513552303523 - 2¹⁷ = 513552172451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513552303923) 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, 36682307388 + ... + 36682307401.

It is an arithmetic number, because the mean of its divisors is an integer number (146729229580).

Almost surely, 2^513552303523 is an apocalyptic number.

513552303523 is a deficient number, since it is larger than the sum of its proper divisors (73364614797).

513552303523 is an equidigital number, since it uses as much as digits as its factorization.

513552303523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73364614796.

The product of its (nonzero) digits is 202500, while the sum is 37.

Adding to 513552303523 its reverse (325303255315), we get a palindrome (838855558838).

The spelling of 513552303523 in words is "five hundred thirteen billion, five hundred fifty-two million, three hundred three thousand, five hundred twenty-three".