520315646503 has 4 divisors (see below), whose sum is σ = 520385485608. Its totient is φ = 520245807400.

The previous prime is 520315646479. The next prime is 520315646519. The reversal of 520315646503 is 305646513025.

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 520315646503 - 2²¹ = 520313549351 is a prime.

It is a super-2 number, since 2×520315646503² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520315646533) 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, 34908376 + ... + 34923277.

It is an arithmetic number, because the mean of its divisors is an integer number (130096371402).

Almost surely, 2^520315646503 is an apocalyptic number.

520315646503 is a deficient number, since it is larger than the sum of its proper divisors (69839105).

520315646503 is an equidigital number, since it uses as much as digits as its factorization.

520315646503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69839104.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 520315646503 in words is "five hundred twenty billion, three hundred fifteen million, six hundred forty-six thousand, five hundred three".