55505231232 has 128 divisors (see below), whose sum is σ = 160966379520. Its totient is φ = 16806451200.

The previous prime is 55505231219. The next prime is 55505231311. The reversal of 55505231232 is 23213250555.

55505231232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 55505231193 and 55505231202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6209038 + ... + 6217970.

It is an arithmetic number, because the mean of its divisors is an integer number (1257549840).

Almost surely, 2^55505231232 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 55505231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80483189760).

55505231232 is an abundant number, since it is smaller than the sum of its proper divisors (105461148288).

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

55505231232 is a wasteful number, since it uses less digits than its factorization.

55505231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10432 (or 10420 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 33.

Adding to 55505231232 its reverse (23213250555), we get a palindrome (78718481787).

The spelling of 55505231232 in words is "fifty-five billion, five hundred five million, two hundred thirty-one thousand, two hundred thirty-two".