27131 has 4 divisors (see below), whose sum is σ = 29232. Its totient is φ = 25032.

The previous prime is 27127. The next prime is 27143. The reversal of 27131 is 13172.

27131 = T₅₈ + T₅₉ + ... + T₇₀.

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 27131 - 2² = 27127 is a prime.

It is a super-2 number, since 2×27131² = 1472182322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (7308).

2²⁷¹³¹ is an apocalyptic number.

27131 is a deficient number, since it is larger than the sum of its proper divisors (2101).

27131 is a wasteful number, since it uses less digits than its factorization.

27131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 42, while the sum is 14.

The square root of 27131 is about 164.7149052150. The cubic root of 27131 is about 30.0484402611.

The spelling of 27131 in words is "twenty-seven thousand, one hundred thirty-one".