55421332 has 12 divisors (see below), whose sum is σ = 97086976. Its totient is φ = 27682200.

The previous prime is 55421323. The next prime is 55421357. The reversal of 55421332 is 23312455.

55421332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55421297 and 55421306.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2388 + ... + 10795.

Almost surely, 2^55421332 is an apocalyptic number.

It is an amenable number.

55421332 is a deficient number, since it is larger than the sum of its proper divisors (41665644).

55421332 is a wasteful number, since it uses less digits than its factorization.

55421332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14238 (or 14236 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 55421332 is about 7444.5504901236. The cubic root of 55421332 is about 381.2638711427.

Adding to 55421332 its reverse (23312455), we get a palindrome (78733787).

The spelling of 55421332 in words is "fifty-five million, four hundred twenty-one thousand, three hundred thirty-two".