51342302461 has 2 divisors, whose sum is σ = 51342302462. Its totient is φ = 51342302460.

The previous prime is 51342302449. The next prime is 51342302471. The reversal of 51342302461 is 16420324315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43903239961 + 7439062500 = 209531^2 + 86250^2 .

It is a cyclic number.

It is not a de Polignac number, because 51342302461 - 2⁹ = 51342301949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51342302441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25671151230 + 25671151231.

It is an arithmetic number, because the mean of its divisors is an integer number (25671151231).

Almost surely, 2^51342302461 is an apocalyptic number.

It is an amenable number.

51342302461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51342302461 is an equidigital number, since it uses as much as digits as its factorization.

51342302461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 51342302461 its reverse (16420324315), we get a palindrome (67762626776).

The spelling of 51342302461 in words is "fifty-one billion, three hundred forty-two million, three hundred two thousand, four hundred sixty-one".