506051163521 has 4 divisors (see below), whose sum is σ = 506188943172. Its totient is φ = 505913383872.

The previous prime is 506051163473. The next prime is 506051163539. The reversal of 506051163521 is 125361150605.

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

It can be written as a sum of positive squares in 2 ways, for example, as 239419383025 + 266631780496 = 489305^2 + 516364^2 .

It is a cyclic number.

It is not a de Polignac number, because 506051163521 - 2¹⁴ = 506051147137 is a prime.

It is a super-2 number, since 2×506051163521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506051168521) 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, 68884316 + ... + 68891661.

It is an arithmetic number, because the mean of its divisors is an integer number (126547235793).

Almost surely, 2^506051163521 is an apocalyptic number.

It is an amenable number.

506051163521 is a deficient number, since it is larger than the sum of its proper divisors (137779651).

506051163521 is a wasteful number, since it uses less digits than its factorization.

506051163521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137779650.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 506051163521 in words is "five hundred six billion, fifty-one million, one hundred sixty-three thousand, five hundred twenty-one".