551135531156 has 24 divisors (see below), whose sum is σ = 1102288508160. Its totient is φ = 236197203552.

The previous prime is 551135531153. The next prime is 551135531201. The reversal of 551135531156 is 651135531155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551135531153) 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, 2354885 + ... + 2578323.

It is an arithmetic number, because the mean of its divisors is an integer number (45928687840).

Almost surely, 2^551135531156 is an apocalyptic number.

It is an amenable number.

551135531156 is an abundant number, since it is smaller than the sum of its proper divisors (551152977004).

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

551135531156 is a wasteful number, since it uses less digits than its factorization.

551135531156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311543 (or 311541 counting only the distinct ones).

The product of its digits is 168750, while the sum is 41.

Subtracting 551135531156 from its reverse (651135531155), we obtain a palindrome (99999999999).

The spelling of 551135531156 in words is "five hundred fifty-one billion, one hundred thirty-five million, five hundred thirty-one thousand, one hundred fifty-six".