55333432 has 64 divisors (see below), whose sum is σ = 132422400. Its totient is φ = 21047040.

The previous prime is 55333379. The next prime is 55333433. The reversal of 55333432 is 23433355.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 55333432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55333433) 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 15 ways as a sum of consecutive naturals, for example, 25444 + ... + 27532.

It is an arithmetic number, because the mean of its divisors is an integer number (2069100).

Almost surely, 2^55333432 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 55333432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66211200).

55333432 is an abundant number, since it is smaller than the sum of its proper divisors (77088968).

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

55333432 is a wasteful number, since it uses less digits than its factorization.

55333432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2152 counting only the distinct ones).

The product of its digits is 16200, while the sum is 28.

The square root of 55333432 is about 7438.6445001761. The cubic root of 55333432 is about 381.0621989327.

Adding to 55333432 its reverse (23433355), we get a palindrome (78766787).

The spelling of 55333432 in words is "fifty-five million, three hundred thirty-three thousand, four hundred thirty-two".