31234041217 has 2 divisors, whose sum is σ = 31234041218. Its totient is φ = 31234041216.

The previous prime is 31234041191. The next prime is 31234041221. The reversal of 31234041217 is 71214043213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30876112656 + 357928561 = 175716^2 + 18919^2 .

It is an emirp because it is prime and its reverse (71214043213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31234041217 - 2¹⁹ = 31233516929 is a prime.

It is not a weakly prime, because it can be changed into another prime (31234041277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15617020608 + 15617020609.

It is an arithmetic number, because the mean of its divisors is an integer number (15617020609).

Almost surely, 2^31234041217 is an apocalyptic number.

It is an amenable number.

31234041217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31234041217 is an equidigital number, since it uses as much as digits as its factorization.

31234041217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 31234041217 in words is "thirty-one billion, two hundred thirty-four million, forty-one thousand, two hundred seventeen".