506487552521 has 4 divisors (see below), whose sum is σ = 506488979712. Its totient is φ = 506486125332.

The previous prime is 506487552509. The next prime is 506487552583. The reversal of 506487552521 is 125255784605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506487552521 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 506487552521.

It is not an unprimeable number, because it can be changed into a prime (506487555521) 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, 278420 + ... + 1044266.

It is an arithmetic number, because the mean of its divisors is an integer number (126622244928).

Almost surely, 2^506487552521 is an apocalyptic number.

It is an amenable number.

506487552521 is a deficient number, since it is larger than the sum of its proper divisors (1427191).

506487552521 is an equidigital number, since it uses as much as digits as its factorization.

506487552521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427190.

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 506487552521 in words is "five hundred six billion, four hundred eighty-seven million, five hundred fifty-two thousand, five hundred twenty-one".