551145036222 has 24 divisors (see below), whose sum is σ = 1302706449720. Its totient is φ = 167013647280.

The previous prime is 551145036173. The next prime is 551145036229. The reversal of 551145036222 is 222630541155.

551145036222 is a `hidden beast` number, since 551 + 1 + 4 + 50 + 36 + 2 + 22 = 666.

551145036222 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551145036229) 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, 1391780197 + ... + 1391780592.

It is an arithmetic number, because the mean of its divisors is an integer number (54279435405).

Almost surely, 2^551145036222 is an apocalyptic number.

551145036222 is an abundant number, since it is smaller than the sum of its proper divisors (751561413498).

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

551145036222 is a wasteful number, since it uses less digits than its factorization.

551145036222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783560808 (or 2783560805 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 551145036222 its reverse (222630541155), we get a palindrome (773775577377).

The spelling of 551145036222 in words is "five hundred fifty-one billion, one hundred forty-five million, thirty-six thousand, two hundred twenty-two".