2051703417521 has 2 divisors, whose sum is σ = 2051703417522. Its totient is φ = 2051703417520.

The previous prime is 2051703417493. The next prime is 2051703417527. The reversal of 2051703417521 is 1257143071502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1402422009121 + 649281408400 = 1184239^2 + 805780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051703417521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2051703417527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025851708760 + 1025851708761.

It is an arithmetic number, because the mean of its divisors is an integer number (1025851708761).

Almost surely, 2^{2051703417521} is an apocalyptic number.

It is an amenable number.

2051703417521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051703417521 is an equidigital number, since it uses as much as digits as its factorization.

2051703417521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 2051703417521 in words is "two trillion, fifty-one billion, seven hundred three million, four hundred seventeen thousand, five hundred twenty-one".