27155243 has 4 divisors (see below), whose sum is σ = 27817608. Its totient is φ = 26492880.

The previous prime is 27155221. The next prime is 27155251. The reversal of 27155243 is 34255172.

It is a happy number.

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 27155243 - 2⁸ = 27154987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27152243) 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, 331121 + ... + 331202.

It is an arithmetic number, because the mean of its divisors is an integer number (6954402).

Almost surely, 2^27155243 is an apocalyptic number.

27155243 is a deficient number, since it is larger than the sum of its proper divisors (662365).

27155243 is an equidigital number, since it uses as much as digits as its factorization.

27155243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662364.

The product of its digits is 8400, while the sum is 29.

The square root of 27155243 is about 5211.0692760699. The cubic root of 27155243 is about 300.5738755968.

The spelling of 27155243 in words is "twenty-seven million, one hundred fifty-five thousand, two hundred forty-three".