551001111100 has 72 divisors (see below), whose sum is σ = 1325753177616. Its totient is φ = 197079360000.

The previous prime is 551001111091. The next prime is 551001111103. The reversal of 551001111100 is 1111100155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551001111103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4038721 + ... + 4172920.

It is an arithmetic number, because the mean of its divisors is an integer number (18413238578).

Almost surely, 2^551001111100 is an apocalyptic number.

551001111100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551001111100 is an abundant number, since it is smaller than the sum of its proper divisors (774752066516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551001111100 is a wasteful number, since it uses less digits than its factorization.

551001111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211727 (or 8211720 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 16.

Adding to 551001111100 its reverse (1111100155), we get a palindrome (552112211255).

The spelling of 551001111100 in words is "five hundred fifty-one billion, one million, one hundred eleven thousand, one hundred".