27318981031 has 2 divisors, whose sum is σ = 27318981032. Its totient is φ = 27318981030.

The previous prime is 27318981017. The next prime is 27318981059. The reversal of 27318981031 is 13018981372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27318981031 - 2¹⁵ = 27318948263 is a prime.

It is a super-2 number, since 2×27318981031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27318981091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13659490515 + 13659490516.

It is an arithmetic number, because the mean of its divisors is an integer number (13659490516).

Almost surely, 2^27318981031 is an apocalyptic number.

27318981031 is a deficient number, since it is larger than the sum of its proper divisors (1).

27318981031 is an equidigital number, since it uses as much as digits as its factorization.

27318981031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 27318981031 in words is "twenty-seven billion, three hundred eighteen million, nine hundred eighty-one thousand, thirty-one".