55443312 has 40 divisors (see below), whose sum is σ = 159144080. Its totient is φ = 18480960.

The previous prime is 55443301. The next prime is 55443329. The reversal of 55443312 is 21334455.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63739 + ... + 64602.

It is an arithmetic number, because the mean of its divisors is an integer number (3978602).

Almost surely, 2^55443312 is an apocalyptic number.

It is an amenable number.

55443312 is an abundant number, since it is smaller than the sum of its proper divisors (103700768).

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

55443312 is a wasteful number, since it uses less digits than its factorization.

55443312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128358 (or 128346 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 55443312 is about 7446.0265914110. The cubic root of 55443312 is about 381.3142673348.

Adding to 55443312 its reverse (21334455), we get a palindrome (76777767).

It can be divided in two parts, 55443 and 312, that added together give a palindrome (55755).

The spelling of 55443312 in words is "fifty-five million, four hundred forty-three thousand, three hundred twelve".