31496000257 has 2 divisors, whose sum is σ = 31496000258. Its totient is φ = 31496000256.

The previous prime is 31496000243. The next prime is 31496000281. The reversal of 31496000257 is 75200069413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29534484736 + 1961515521 = 171856^2 + 44289^2 .

It is a cyclic number.

It is not a de Polignac number, because 31496000257 - 2³¹ = 29348516609 is a prime.

It is not a weakly prime, because it can be changed into another prime (31496100257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15748000128 + 15748000129.

It is an arithmetic number, because the mean of its divisors is an integer number (15748000129).

Almost surely, 2^31496000257 is an apocalyptic number.

It is an amenable number.

31496000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

31496000257 is an equidigital number, since it uses as much as digits as its factorization.

31496000257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 31496000257 in words is "thirty-one billion, four hundred ninety-six million, two hundred fifty-seven", and thus it is an aban number.