1031404323217 has 2 divisors, whose sum is σ = 1031404323218. Its totient is φ = 1031404323216.

The previous prime is 1031404323211. The next prime is 1031404323239. The reversal of 1031404323217 is 7123234041301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653395772241 + 378008550976 = 808329^2 + 614824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031404323217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031404323211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515702161608 + 515702161609.

It is an arithmetic number, because the mean of its divisors is an integer number (515702161609).

Almost surely, 2^{1031404323217} is an apocalyptic number.

It is an amenable number.

1031404323217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031404323217 is an equidigital number, since it uses as much as digits as its factorization.

1031404323217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 1031404323217 its reverse (7123234041301), we get a palindrome (8154638364518).

The spelling of 1031404323217 in words is "one trillion, thirty-one billion, four hundred four million, three hundred twenty-three thousand, two hundred seventeen".