27550543 has 4 divisors (see below), whose sum is σ = 27818128. Its totient is φ = 27282960.

The previous prime is 27550531. The next prime is 27550571. The reversal of 27550543 is 34505572.

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 27550543 - 2⁵ = 27550511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27550583) by changing a digit.

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, 133638 + ... + 133843.

It is an arithmetic number, because the mean of its divisors is an integer number (6954532).

Almost surely, 2^27550543 is an apocalyptic number.

27550543 is a deficient number, since it is larger than the sum of its proper divisors (267585).

27550543 is a wasteful number, since it uses less digits than its factorization.

27550543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267584.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 27550543 is about 5248.8611145657. The cubic root of 27550543 is about 302.0253439836.

The spelling of 27550543 in words is "twenty-seven million, five hundred fifty thousand, five hundred forty-three".