550321632 has 144 divisors (see below), whose sum is σ = 1850415840. Its totient is φ = 151796736.

The previous prime is 550321619. The next prime is 550321649. The reversal of 550321632 is 236123055.

550321632 is a `hidden beast` number, since 5 + 5 + 0 + 3 + 21 + 632 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 550321596 and 550321605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53758 + ... + 63170.

It is an arithmetic number, because the mean of its divisors is an integer number (12850110).

Almost surely, 2^550321632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550321632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925207920).

550321632 is an abundant number, since it is smaller than the sum of its proper divisors (1300094208).

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

550321632 is a wasteful number, since it uses less digits than its factorization.

550321632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465 (or 9454 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 550321632 is about 23458.9350141902. The cubic root of 550321632 is about 819.4809485328.

Adding to 550321632 its reverse (236123055), we get a palindrome (786444687).

The spelling of 550321632 in words is "five hundred fifty million, three hundred twenty-one thousand, six hundred thirty-two".