551243111140 has 24 divisors (see below), whose sum is σ = 1157846074560. Its totient is φ = 220452379488.

The previous prime is 551243111129. The next prime is 551243111149. The reversal of 551243111140 is 41111342155.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 551243111099 and 551243111108.

It is not an unprimeable number, because it can be changed into a prime (551243111149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2703222 + ... + 2899981.

It is an arithmetic number, because the mean of its divisors is an integer number (48243586440).

Almost surely, 2^551243111140 is an apocalyptic number.

It is an amenable number.

551243111140 is an abundant number, since it is smaller than the sum of its proper divisors (606602963420).

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

551243111140 is a wasteful number, since it uses less digits than its factorization.

551243111140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608131 (or 5608129 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 551243111140 its reverse (41111342155), we get a palindrome (592354453295).

The spelling of 551243111140 in words is "five hundred fifty-one billion, two hundred forty-three million, one hundred eleven thousand, one hundred forty".