551324512521 has 12 divisors (see below), whose sum is σ = 797325267648. Its totient is φ = 367103072664.

The previous prime is 551324512511. The next prime is 551324512561. The reversal of 551324512521 is 125215423155.

551324512521 is a `hidden beast` number, since 5 + 5 + 132 + 4 + 512 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 551324512521 - 2¹⁹ = 551323988233 is a prime.

It is a super-3 number, since 3×551324512521³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (551324512511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37209045 + ... + 37223858.

It is an arithmetic number, because the mean of its divisors is an integer number (66443772304).

Almost surely, 2^551324512521 is an apocalyptic number.

It is an amenable number.

551324512521 is a deficient number, since it is larger than the sum of its proper divisors (246000755127).

551324512521 is a wasteful number, since it uses less digits than its factorization.

551324512521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74433732 (or 74433729 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

Adding to 551324512521 its reverse (125215423155), we get a palindrome (676539935676).

The spelling of 551324512521 in words is "five hundred fifty-one billion, three hundred twenty-four million, five hundred twelve thousand, five hundred twenty-one".