27131965 has 16 divisors (see below), whose sum is σ = 38494080. Its totient is φ = 17962560.

The previous prime is 27131963. The next prime is 27131969. The reversal of 27131965 is 56913172.

It is not a de Polignac number, because 27131965 - 2¹ = 27131963 is a prime.

It is a super-2 number, since 2×27131965² = 1472287049522450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27131965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27131963) 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 15 ways as a sum of consecutive naturals, for example, 12351 + ... + 14380.

It is an arithmetic number, because the mean of its divisors is an integer number (2405880).

Almost surely, 2^27131965 is an apocalyptic number.

It is an amenable number.

27131965 is a deficient number, since it is larger than the sum of its proper divisors (11362115).

27131965 is a wasteful number, since it uses less digits than its factorization.

27131965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26772.

The product of its digits is 11340, while the sum is 34.

The square root of 27131965 is about 5208.8352824792. The cubic root of 27131965 is about 300.4879651290.

The spelling of 27131965 in words is "twenty-seven million, one hundred thirty-one thousand, nine hundred sixty-five".