51106420322989 has 2 divisors, whose sum is σ = 51106420322990. Its totient is φ = 51106420322988.

The previous prime is 51106420322963. The next prime is 51106420323071. The reversal of 51106420322989 is 98922302460115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27633073618089 + 23473346704900 = 5256717^2 + 4844930^2 .

It is a cyclic number.

It is not a de Polignac number, because 51106420322989 - 2⁵ = 51106420322957 is a prime.

It is a super-2 number, since 2×51106420322989² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51106420326989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25553210161494 + 25553210161495.

It is an arithmetic number, because the mean of its divisors is an integer number (25553210161495).

Almost surely, 2^{51106420322989} is an apocalyptic number.

It is an amenable number.

51106420322989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51106420322989 is an equidigital number, since it uses as much as digits as its factorization.

51106420322989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 51106420322989 in words is "fifty-one trillion, one hundred six billion, four hundred twenty million, three hundred twenty-two thousand, nine hundred eighty-nine".