27805051 has 2 divisors, whose sum is σ = 27805052. Its totient is φ = 27805050.

The previous prime is 27805049. The next prime is 27805097. The reversal of 27805051 is 15050872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27805051 - 2¹ = 27805049 is a prime.

It is a super-2 number, since 2×27805051² = 1546241722225202, which contains 22 as substring.

Together with 27805049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27805031) 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, 13902525 + 13902526.

It is an arithmetic number, because the mean of its divisors is an integer number (13902526).

Almost surely, 2^27805051 is an apocalyptic number.

27805051 is a deficient number, since it is larger than the sum of its proper divisors (1).

27805051 is an equidigital number, since it uses as much as digits as its factorization.

27805051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 27805051 is about 5273.0494972075. The cubic root of 27805051 is about 302.9525171848.

The spelling of 27805051 in words is "twenty-seven million, eight hundred five thousand, fifty-one".