31434111217 has 2 divisors, whose sum is σ = 31434111218. Its totient is φ = 31434111216.

The previous prime is 31434111211. The next prime is 31434111227. The reversal of 31434111217 is 71211143413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20842408161 + 10591703056 = 144369^2 + 102916^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434111217 - 2³ = 31434111209 is a prime.

It is not a weakly prime, because it can be changed into another prime (31434111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15717055608 + 15717055609.

It is an arithmetic number, because the mean of its divisors is an integer number (15717055609).

Almost surely, 2^31434111217 is an apocalyptic number.

It is an amenable number.

31434111217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31434111217 is an equidigital number, since it uses as much as digits as its factorization.

31434111217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The spelling of 31434111217 in words is "thirty-one billion, four hundred thirty-four million, one hundred eleven thousand, two hundred seventeen".