1331322617 has 2 divisors, whose sum is σ = 1331322618. Its totient is φ = 1331322616.

The previous prime is 1331322607. The next prime is 1331322637. The reversal of 1331322617 is 7162231331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984767161 + 346555456 = 31381^2 + 18616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331322617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331322617.

It is not a weakly prime, because it can be changed into another prime (1331322607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665661308 + 665661309.

It is an arithmetic number, because the mean of its divisors is an integer number (665661309).

Almost surely, 2^1331322617 is an apocalyptic number.

It is an amenable number.

1331322617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331322617 is an equidigital number, since it uses as much as digits as its factorization.

1331322617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 1331322617 is about 36487.2939117167. The cubic root of 1331322617 is about 1100.0888680268.

Adding to 1331322617 its reverse (7162231331), we get a palindrome (8493553948).

The spelling of 1331322617 in words is "one billion, three hundred thirty-one million, three hundred twenty-two thousand, six hundred seventeen".