27281313 has 8 divisors (see below), whose sum is σ = 40416800. Its totient is φ = 18187524.

The previous prime is 27281281. The next prime is 27281323. The reversal of 27281313 is 31318272.

27281313 is a `hidden beast` number, since 272 + 81 + 313 = 666.

It is not a de Polignac number, because 27281313 - 2⁵ = 27281281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1010419 = 27281313 / (2 + 7 + 2 + 8 + 1 + 3 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27281323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505183 + ... + 505236.

It is an arithmetic number, because the mean of its divisors is an integer number (5052100).

Almost surely, 2^27281313 is an apocalyptic number.

It is an amenable number.

27281313 is a deficient number, since it is larger than the sum of its proper divisors (13135487).

27281313 is a wasteful number, since it uses less digits than its factorization.

27281313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010428 (or 1010422 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 27281313 is about 5223.1516347891. The cubic root of 27281313 is about 301.0383022821.

Adding to 27281313 its reverse (31318272), we get a palindrome (58599585).

The spelling of 27281313 in words is "twenty-seven million, two hundred eighty-one thousand, three hundred thirteen".