51362431073 has 2 divisors, whose sum is σ = 51362431074. Its totient is φ = 51362431072.

The previous prime is 51362431049. The next prime is 51362431111. The reversal of 51362431073 is 37013426315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34630232464 + 16732198609 = 186092^2 + 129353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51362431073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51362431033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25681215536 + 25681215537.

It is an arithmetic number, because the mean of its divisors is an integer number (25681215537).

Almost surely, 2^51362431073 is an apocalyptic number.

It is an amenable number.

51362431073 is a deficient number, since it is larger than the sum of its proper divisors (1).

51362431073 is an equidigital number, since it uses as much as digits as its factorization.

51362431073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

Adding to 51362431073 its reverse (37013426315), we get a palindrome (88375857388).

The spelling of 51362431073 in words is "fifty-one billion, three hundred sixty-two million, four hundred thirty-one thousand, seventy-three".