27552145 has 4 divisors (see below), whose sum is σ = 33062580. Its totient is φ = 22041712.

The previous prime is 27552139. The next prime is 27552157. The reversal of 27552145 is 54125572.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9979281 + 17572864 = 3159^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 27552145 - 2¹⁵ = 27519377 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 3 ways as a sum of consecutive naturals, for example, 2755210 + ... + 2755219.

It is an arithmetic number, because the mean of its divisors is an integer number (8265645).

Almost surely, 2^27552145 is an apocalyptic number.

It is an amenable number.

27552145 is a deficient number, since it is larger than the sum of its proper divisors (5510435).

27552145 is an equidigital number, since it uses as much as digits as its factorization.

27552145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510434.

The product of its digits is 14000, while the sum is 31.

The square root of 27552145 is about 5249.0137168805. The cubic root of 27552145 is about 302.0311978939.

It can be divided in two parts, 2755 and 2145, that added together give a square (4900 = 70²).

The spelling of 27552145 in words is "twenty-seven million, five hundred fifty-two thousand, one hundred forty-five".