51362420881 has 2 divisors, whose sum is σ = 51362420882. Its totient is φ = 51362420880.

The previous prime is 51362420843. The next prime is 51362420929. The reversal of 51362420881 is 18802426315.

51362420881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33133100625 + 18229320256 = 182025^2 + 135016^2 .

It is a cyclic number.

It is not a de Polignac number, because 51362420881 - 2¹⁵ = 51362388113 is a prime.

It is a super-2 number, since 2×51362420881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51362420581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25681210440 + 25681210441.

It is an arithmetic number, because the mean of its divisors is an integer number (25681210441).

Almost surely, 2^51362420881 is an apocalyptic number.

It is an amenable number.

51362420881 is a deficient number, since it is larger than the sum of its proper divisors (1).

51362420881 is an equidigital number, since it uses as much as digits as its factorization.

51362420881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 51362420881 in words is "fifty-one billion, three hundred sixty-two million, four hundred twenty thousand, eight hundred eighty-one".