27102155 has 4 divisors (see below), whose sum is σ = 32522592. Its totient is φ = 21681720.

The previous prime is 27102149. The next prime is 27102157. The reversal of 27102155 is 55120172.

It is a happy number.

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

It is not a de Polignac number, because 27102155 - 2²⁴ = 10324939 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 27102155.

It is not an unprimeable number, because it can be changed into a prime (27102157) 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, 2710211 + ... + 2710220.

It is an arithmetic number, because the mean of its divisors is an integer number (8130648).

Almost surely, 2^27102155 is an apocalyptic number.

27102155 is a deficient number, since it is larger than the sum of its proper divisors (5420437).

27102155 is an equidigital number, since it uses as much as digits as its factorization.

27102155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420436.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 27102155 is about 5205.9730118394. The cubic root of 27102155 is about 300.3778756852.

The spelling of 27102155 in words is "twenty-seven million, one hundred two thousand, one hundred fifty-five".