551503004121 has 12 divisors (see below), whose sum is σ = 796624713300. Its totient is φ = 367664394240.

The previous prime is 551503004113. The next prime is 551503004153. The reversal of 551503004121 is 121400305155.

551503004121 is a `hidden beast` number, since 551 + 50 + 3 + 0 + 0 + 41 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13423539600 + 538079464521 = 115860^2 + 733539^2 .

It is not a de Polignac number, because 551503004121 - 2³ = 551503004113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551503000121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594201 + ... + 1206681.

It is an arithmetic number, because the mean of its divisors is an integer number (66385392775).

Almost surely, 2^551503004121 is an apocalyptic number.

It is an amenable number.

551503004121 is a deficient number, since it is larger than the sum of its proper divisors (245121709179).

551503004121 is a wasteful number, since it uses less digits than its factorization.

551503004121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712536 (or 712533 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 551503004121 its reverse (121400305155), we get a palindrome (672903309276).

The spelling of 551503004121 in words is "five hundred fifty-one billion, five hundred three million, four thousand, one hundred twenty-one".