2051291717 has 2 divisors, whose sum is σ = 2051291718. Its totient is φ = 2051291716.

The previous prime is 2051291687. The next prime is 2051291741. The reversal of 2051291717 is 7171921502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1302776836 + 748514881 = 36094^2 + 27359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051291717 - 2¹² = 2051287621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051294717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025645858 + 1025645859.

It is an arithmetic number, because the mean of its divisors is an integer number (1025645859).

Almost surely, 2^2051291717 is an apocalyptic number.

It is an amenable number.

2051291717 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051291717 is an equidigital number, since it uses as much as digits as its factorization.

2051291717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 35.

The square root of 2051291717 is about 45291.1880722950. The cubic root of 2051291717 is about 1270.6008517342.

The spelling of 2051291717 in words is "two billion, fifty-one million, two hundred ninety-one thousand, seven hundred seventeen".