27156243 has 4 divisors (see below), whose sum is σ = 36208328. Its totient is φ = 18104160.

The previous prime is 27156229. The next prime is 27156247. The reversal of 27156243 is 34265172.

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

It is not a de Polignac number, because 27156243 - 2⁶ = 27156179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27156243.

It is not an unprimeable number, because it can be changed into a prime (27156247) 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, 4526038 + ... + 4526043.

It is an arithmetic number, because the mean of its divisors is an integer number (9052082).

Almost surely, 2^27156243 is an apocalyptic number.

27156243 is a deficient number, since it is larger than the sum of its proper divisors (9052085).

27156243 is an equidigital number, since it uses as much as digits as its factorization.

27156243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052084.

The product of its digits is 10080, while the sum is 30.

The square root of 27156243 is about 5211.1652247842. The cubic root of 27156243 is about 300.5775651260.

The spelling of 27156243 in words is "twenty-seven million, one hundred fifty-six thousand, two hundred forty-three".