55443550 has 24 divisors (see below), whose sum is σ = 105323616. Its totient is φ = 21704640.

The previous prime is 55443533. The next prime is 55443569. The reversal of 55443550 is 5534455.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 9447 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (4388484).

Almost surely, 2^55443550 is an apocalyptic number.

55443550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55443550 is a deficient number, since it is larger than the sum of its proper divisors (49880066).

55443550 is a wasteful number, since it uses less digits than its factorization.

55443550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23652 (or 23647 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 31.

The square root of 55443550 is about 7446.0425730720. The cubic root of 55443550 is about 381.3148129531.

The spelling of 55443550 in words is "fifty-five million, four hundred forty-three thousand, five hundred fifty".