31994197159 has 2 divisors, whose sum is σ = 31994197160. Its totient is φ = 31994197158.

The previous prime is 31994197139. The next prime is 31994197201. The reversal of 31994197159 is 95179149913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31994197159 - 2¹⁷ = 31994066087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31994197139) 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, 15997098579 + 15997098580.

It is an arithmetic number, because the mean of its divisors is an integer number (15997098580).

Almost surely, 2^31994197159 is an apocalyptic number.

31994197159 is a deficient number, since it is larger than the sum of its proper divisors (1).

31994197159 is an equidigital number, since it uses as much as digits as its factorization.

31994197159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 58.

The spelling of 31994197159 in words is "thirty-one billion, nine hundred ninety-four million, one hundred ninety-seven thousand, one hundred fifty-nine".