551418228 has 72 divisors (see below), whose sum is σ = 1482528320. Its totient is φ = 172316160.

The previous prime is 551418227. The next prime is 551418229. The reversal of 551418228 is 822814155.

551418228 is a `hidden beast` number, since 551 + 4 + 1 + 82 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (551418227) and next prime (551418229).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 551418192 and 551418201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551418227) 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, 62193 + ... + 70503.

Almost surely, 2^551418228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551418228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741264160).

551418228 is an abundant number, since it is smaller than the sum of its proper divisors (931110092).

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

551418228 is a wasteful number, since it uses less digits than its factorization.

551418228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437 (or 8432 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 551418228 is about 23482.2960546877. The cubic root of 551418228 is about 820.0248991051.

The spelling of 551418228 in words is "five hundred fifty-one million, four hundred eighteen thousand, two hundred twenty-eight".