551232864 has 576 divisors, whose sum is σ = 2157442560. Its totient is φ = 134369280.

The previous prime is 551232833. The next prime is 551232889. The reversal of 551232864 is 468232155.

551232864 is a `hidden beast` number, since 551 + 23 + 2 + 86 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13444684 + ... + 13444724.

It is an arithmetic number, because the mean of its divisors is an integer number (3745560).

Almost surely, 2^551232864 is an apocalyptic number.

551232864 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551232864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078721280).

551232864 is an abundant number, since it is smaller than the sum of its proper divisors (1606209696).

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

551232864 is a wasteful number, since it uses less digits than its factorization.

551232864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 85 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 551232864 is about 23478.3488346178. The cubic root of 551232864 is about 819.9330026563.

The spelling of 551232864 in words is "five hundred fifty-one million, two hundred thirty-two thousand, eight hundred sixty-four".