551232330 has 64 divisors (see below), whose sum is σ = 1470503808. Its totient is φ = 131106560.

The previous prime is 551232317. The next prime is 551232343. The reversal of 551232330 is 33232155.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (551232317) and next prime (551232343).

It is a self number, because there is not a number n which added to its sum of digits gives 551232330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1732 + ... + 33248.

It is an arithmetic number, because the mean of its divisors is an integer number (22976622).

Almost surely, 2^551232330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551232330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735251904).

551232330 is an abundant number, since it is smaller than the sum of its proper divisors (919271478).

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

551232330 is a wasteful number, since it uses less digits than its factorization.

551232330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31591.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 551232330 is about 23478.3374624355. The cubic root of 551232330 is about 819.9327378895.

Adding to 551232330 its reverse (33232155), we get a palindrome (584464485).

The spelling of 551232330 in words is "five hundred fifty-one million, two hundred thirty-two thousand, three hundred thirty".