27154531 has 2 divisors, whose sum is σ = 27154532. Its totient is φ = 27154530.

The previous prime is 27154511. The next prime is 27154549. The reversal of 27154531 is 13545172.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27154531 - 2⁵ = 27154499 is a prime.

It is a super-2 number, since 2×27154531² = 1474737107659922, which contains 22 as substring.

It is equal to p_1692145 and since 27154531 and 1692145 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27154531.

It is not a weakly prime, because it can be changed into another prime (27154511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13577265 + 13577266.

It is an arithmetic number, because the mean of its divisors is an integer number (13577266).

Almost surely, 2^27154531 is an apocalyptic number.

27154531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27154531 is an equidigital number, since it uses as much as digits as its factorization.

27154531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 27154531 is about 5211.0009595086. Note that the first 3 decimals coincide. The cubic root of 27154531 is about 300.5712485968.

The spelling of 27154531 in words is "twenty-seven million, one hundred fifty-four thousand, five hundred thirty-one".