31000000027 has 2 divisors, whose sum is σ = 31000000028. Its totient is φ = 31000000026.

The previous prime is 30999999997. The next prime is 31000000067. The reversal of 31000000027 is 72000000013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31000000027 - 2²³ = 30991611419 is a prime.

It is a super-2 number, since 2×31000000027² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30999999953 and 31000000016.

It is not a weakly prime, because it can be changed into another prime (31000000067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500000013 + 15500000014.

It is an arithmetic number, because the mean of its divisors is an integer number (15500000014).

Almost surely, 2^31000000027 is an apocalyptic number.

31000000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000000027 is an equidigital number, since it uses as much as digits as its factorization.

31000000027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 13.

The spelling of 31000000027 in words is "thirty-one billion, twenty-seven", and thus it is an aban number and an uban number.