551783232 has 672 divisors, whose sum is σ = 2270150400. Its totient is φ = 127733760.

The previous prime is 551783213. The next prime is 551783233. The reversal of 551783232 is 232387155.

It is a happy number.

551783232 is a `hidden beast` number, since 551 + 7 + 83 + 23 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551783233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19026994 + ... + 19027022.

It is an arithmetic number, because the mean of its divisors is an integer number (3378200).

Almost surely, 2^551783232 is an apocalyptic number.

551783232 is a gapful number since it is divisible by the number (52) 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 551783232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135075200).

551783232 is an abundant number, since it is smaller than the sum of its proper divisors (1718367168).

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

551783232 is a wasteful number, since it uses less digits than its factorization.

551783232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 65 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 551783232 is about 23490.0666665721. The cubic root of 551783232 is about 820.2057940746.

The spelling of 551783232 in words is "five hundred fifty-one million, seven hundred eighty-three thousand, two hundred thirty-two".