551218230 has 128 divisors (see below), whose sum is σ = 1575936000. Its totient is φ = 136743552.

The previous prime is 551218201. The next prime is 551218231. The reversal of 551218230 is 32812155.

It is a happy number.

551218230 is a `hidden beast` number, since 551 + 2 + 1 + 82 + 30 = 666.

551218230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 551218194 and 551218203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551218231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228571 + ... + 230969.

It is an arithmetic number, because the mean of its divisors is an integer number (12312000).

Almost surely, 2^551218230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551218230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787968000).

551218230 is an abundant number, since it is smaller than the sum of its proper divisors (1024717770).

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

551218230 is a wasteful number, since it uses less digits than its factorization.

551218230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 551218230 is about 23478.0371837170. The cubic root of 551218230 is about 819.9257467961.

The spelling of 551218230 in words is "five hundred fifty-one million, two hundred eighteen thousand, two hundred thirty".