31301231000257 has 2 divisors, whose sum is σ = 31301231000258. Its totient is φ = 31301231000256.

The previous prime is 31301231000243. The next prime is 31301231000359. The reversal of 31301231000257 is 75200013210313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25200410040001 + 6100820960256 = 5020001^2 + 2469984^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301231000257 - 2⁷ = 31301231000129 is a prime.

It is not a weakly prime, because it can be changed into another prime (31301231003257) 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, 15650615500128 + 15650615500129.

It is an arithmetic number, because the mean of its divisors is an integer number (15650615500129).

Almost surely, 2^{31301231000257} is an apocalyptic number.

It is an amenable number.

31301231000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301231000257 is an equidigital number, since it uses as much as digits as its factorization.

31301231000257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The spelling of 31301231000257 in words is "thirty-one trillion, three hundred one billion, two hundred thirty-one million, two hundred fifty-seven", and thus it is an aban number.