2051251062481 has 2 divisors, whose sum is σ = 2051251062482. Its totient is φ = 2051251062480.

The previous prime is 2051251062473. The next prime is 2051251062521. The reversal of 2051251062481 is 1842601521502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234909900225 + 816341162256 = 1111265^2 + 903516^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051251062481 - 2³ = 2051251062473 is a prime.

It is a super-2 number, since 2×2051251062481² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2051251062481.

It is not a weakly prime, because it can be changed into another prime (2051251062461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025625531240 + 1025625531241.

It is an arithmetic number, because the mean of its divisors is an integer number (1025625531241).

Almost surely, 2^{2051251062481} is an apocalyptic number.

It is an amenable number.

2051251062481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051251062481 is an equidigital number, since it uses as much as digits as its factorization.

2051251062481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 37.

Adding to 2051251062481 its reverse (1842601521502), we get a palindrome (3893852583983).

The spelling of 2051251062481 in words is "two trillion, fifty-one billion, two hundred fifty-one million, sixty-two thousand, four hundred eighty-one".