55321444 has 48 divisors (see below), whose sum is σ = 104428800. Its totient is φ = 25595136.

The previous prime is 55321439. The next prime is 55321477. The reversal of 55321444 is 44412355.

It is an unprimeable number.

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, 397927 + ... + 398065.

It is an arithmetic number, because the mean of its divisors is an integer number (2175600).

Almost surely, 2^55321444 is an apocalyptic number.

It is an amenable number.

55321444 is a deficient number, since it is larger than the sum of its proper divisors (49107356).

55321444 is a wasteful number, since it uses less digits than its factorization.

55321444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 290 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 55321444 is about 7437.8386645584. The cubic root of 55321444 is about 381.0346778759.

Adding to 55321444 its reverse (44412355), we get a palindrome (99733799).

The spelling of 55321444 in words is "fifty-five million, three hundred twenty-one thousand, four hundred forty-four".