27155771 has 2 divisors, whose sum is σ = 27155772. Its totient is φ = 27155770.

The previous prime is 27155767. The next prime is 27155813. The reversal of 27155771 is 17755172.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27155771 - 2² = 27155767 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27155741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13577885 + 13577886.

It is an arithmetic number, because the mean of its divisors is an integer number (13577886).

Almost surely, 2^27155771 is an apocalyptic number.

27155771 is a deficient number, since it is larger than the sum of its proper divisors (1).

27155771 is an equidigital number, since it uses as much as digits as its factorization.

27155771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17150, while the sum is 35.

The square root of 27155771 is about 5211.1199372112. The cubic root of 27155771 is about 300.5758236795.

The spelling of 27155771 in words is "twenty-seven million, one hundred fifty-five thousand, seven hundred seventy-one".