31301231000077 has 2 divisors, whose sum is σ = 31301231000078. Its totient is φ = 31301231000076.

The previous prime is 31301231000071. The next prime is 31301231000111. The reversal of 31301231000077 is 77000013210313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31210758782281 + 90472217796 = 5586659^2 + 300786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301231000077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31301231000071) 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, 15650615500038 + 15650615500039.

It is an arithmetic number, because the mean of its divisors is an integer number (15650615500039).

Almost surely, 2^{31301231000077} is an apocalyptic number.

It is an amenable number.

31301231000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301231000077 is an equidigital number, since it uses as much as digits as its factorization.

31301231000077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 28.

The spelling of 31301231000077 in words is "thirty-one trillion, three hundred one billion, two hundred thirty-one million, seventy-seven", and thus it is an aban number.