27480155 has 4 divisors (see below), whose sum is σ = 32976192. Its totient is φ = 21984120.

The previous prime is 27480151. The next prime is 27480163. The reversal of 27480155 is 55108472.

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

It is not a de Polignac number, because 27480155 - 2² = 27480151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27480151) 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, 2748011 + ... + 2748020.

It is an arithmetic number, because the mean of its divisors is an integer number (8244048).

Almost surely, 2^27480155 is an apocalyptic number.

27480155 is a deficient number, since it is larger than the sum of its proper divisors (5496037).

27480155 is an equidigital number, since it uses as much as digits as its factorization.

27480155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496036.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 27480155 is about 5242.1517528587. The cubic root of 27480155 is about 301.7679129986.

The spelling of 27480155 in words is "twenty-seven million, four hundred eighty thousand, one hundred fifty-five".