31325864831971 has 2 divisors, whose sum is σ = 31325864831972. Its totient is φ = 31325864831970.

The previous prime is 31325864831959. The next prime is 31325864832077. The reversal of 31325864831971 is 17913846852313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31325864831971 - 2⁵ = 31325864831939 is a prime.

It is not a weakly prime, because it can be changed into another prime (31325864831071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662932415985 + 15662932415986.

It is an arithmetic number, because the mean of its divisors is an integer number (15662932415986).

Almost surely, 2^{31325864831971} is an apocalyptic number.

31325864831971 is a deficient number, since it is larger than the sum of its proper divisors (1).

31325864831971 is an equidigital number, since it uses as much as digits as its factorization.

31325864831971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 61.

The spelling of 31325864831971 in words is "thirty-one trillion, three hundred twenty-five billion, eight hundred sixty-four million, eight hundred thirty-one thousand, nine hundred seventy-one".