551728332 has 36 divisors (see below), whose sum is σ = 1397487000. Its totient is φ = 183534912.

The previous prime is 551728271. The next prime is 551728351. The reversal of 551728332 is 233827155.

It is a happy number.

551728332 is a `hidden beast` number, since 551 + 72 + 8 + 3 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

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 11 ways as a sum of consecutive naturals, for example, 2608 + ... + 33320.

Almost surely, 2^551728332 is an apocalyptic number.

It is an amenable number.

551728332 is an abundant number, since it is smaller than the sum of its proper divisors (845758668).

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

551728332 is a wasteful number, since it uses less digits than its factorization.

551728332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31222 (or 31217 counting only the distinct ones).

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

The square root of 551728332 is about 23488.8980584445. The cubic root of 551728332 is about 820.1785908851.

It can be divided in two parts, 55172 and 8332, that added together give a square (63504 = 252²).

The spelling of 551728332 in words is "five hundred fifty-one million, seven hundred twenty-eight thousand, three hundred thirty-two".