551243103211 has 4 divisors (see below), whose sum is σ = 554322673800. Its totient is φ = 548163532624.

The previous prime is 551243103209. The next prime is 551243103253. The reversal of 551243103211 is 112301342155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112301342155 = 5 ⋅22460268431.

It is a cyclic number.

It is not a de Polignac number, because 551243103211 - 2¹ = 551243103209 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 551243103211.

It is not an unprimeable number, because it can be changed into a prime (551243103311) 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, 1539785026 + ... + 1539785383.

It is an arithmetic number, because the mean of its divisors is an integer number (138580668450).

Almost surely, 2^551243103211 is an apocalyptic number.

551243103211 is a deficient number, since it is larger than the sum of its proper divisors (3079570589).

551243103211 is a wasteful number, since it uses less digits than its factorization.

551243103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079570588.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 551243103211 its reverse (112301342155), we get a palindrome (663544445366).

The spelling of 551243103211 in words is "five hundred fifty-one billion, two hundred forty-three million, one hundred three thousand, two hundred eleven".