551121164 has 24 divisors (see below), whose sum is σ = 1114032528. Its totient is φ = 235773440.

The previous prime is 551121149. The next prime is 551121169. The reversal of 551121164 is 461121155.

It is not an unprimeable number, because it can be changed into a prime (551121169) 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, 367649 + ... + 369144.

It is an arithmetic number, because the mean of its divisors is an integer number (46418022).

Almost surely, 2^551121164 is an apocalyptic number.

It is an amenable number.

551121164 is an abundant number, since it is smaller than the sum of its proper divisors (562911364).

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

551121164 is a wasteful number, since it uses less digits than its factorization.

551121164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736825 (or 736823 counting only the distinct ones).

The product of its digits is 1200, while the sum is 26.

The square root of 551121164 is about 23475.9699267144. The cubic root of 551121164 is about 819.8776160799.

Subtracting from 551121164 its reverse (461121155), we obtain a palindrome (90000009).

The spelling of 551121164 in words is "five hundred fifty-one million, one hundred twenty-one thousand, one hundred sixty-four".