27771131 has 2 divisors, whose sum is σ = 27771132. Its totient is φ = 27771130.

The previous prime is 27771119. The next prime is 27771157. The reversal of 27771131 is 13117772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27771131 - 2¹⁴ = 27754747 is a prime.

It is a super-2 number, since 2×27771131² = 1542471434038322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27771094 and 27771103.

It is not a weakly prime, because it can be changed into another prime (27771631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885565 + 13885566.

It is an arithmetic number, because the mean of its divisors is an integer number (13885566).

Almost surely, 2^27771131 is an apocalyptic number.

27771131 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771131 is an equidigital number, since it uses as much as digits as its factorization.

27771131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2058, while the sum is 29.

The square root of 27771131 is about 5269.8321605152. The cubic root of 27771131 is about 302.8292742182.

The spelling of 27771131 in words is "twenty-seven million, seven hundred seventy-one thousand, one hundred thirty-one".