55055543 has 4 divisors (see below), whose sum is σ = 56954040. Its totient is φ = 53157048.

The previous prime is 55055479. The next prime is 55055569. The reversal of 55055543 is 34555055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55055543 - 2⁶ = 55055479 is a prime.

It is a super-2 number, since 2×55055543² = 6062225630049698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949205 + ... + 949262.

It is an arithmetic number, because the mean of its divisors is an integer number (14238510).

Almost surely, 2^55055543 is an apocalyptic number.

55055543 is a deficient number, since it is larger than the sum of its proper divisors (1898497).

55055543 is a wasteful number, since it uses less digits than its factorization.

55055543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898496.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 55055543 is about 7419.9422504491. The cubic root of 55055543 is about 380.4232196059.

The spelling of 55055543 in words is "fifty-five million, fifty-five thousand, five hundred forty-three".