51025235489 has 2 divisors, whose sum is σ = 51025235490. Its totient is φ = 51025235488.

The previous prime is 51025235479. The next prime is 51025235533. The reversal of 51025235489 is 98453252015.

51025235489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51025235533) can be obtained adding 51025235489 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34339054864 + 16686180625 = 185308^2 + 129175^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025235489 - 2⁴ = 51025235473 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 (51025235449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512617744 + 25512617745.

It is an arithmetic number, because the mean of its divisors is an integer number (25512617745).

Almost surely, 2^51025235489 is an apocalyptic number.

It is an amenable number.

51025235489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025235489 is an equidigital number, since it uses as much as digits as its factorization.

51025235489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 51025235489 in words is "fifty-one billion, twenty-five million, two hundred thirty-five thousand, four hundred eighty-nine".