551244512011 has 4 divisors (see below), whose sum is σ = 551324421000. Its totient is φ = 551164603024.

The previous prime is 551244512003. The next prime is 551244512017. The reversal of 551244512011 is 110215442155.

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

It is a cyclic number.

It is not a de Polignac number, because 551244512011 - 2³ = 551244512003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551244512017) 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, 39944146 + ... + 39957943.

It is an arithmetic number, because the mean of its divisors is an integer number (137831105250).

Almost surely, 2^551244512011 is an apocalyptic number.

551244512011 is a deficient number, since it is larger than the sum of its proper divisors (79908989).

551244512011 is an equidigital number, since it uses as much as digits as its factorization.

551244512011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79908988.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 551244512011 its reverse (110215442155), we get a palindrome (661459954166).

The spelling of 551244512011 in words is "five hundred fifty-one billion, two hundred forty-four million, five hundred twelve thousand, eleven".