51105522089 has 2 divisors, whose sum is σ = 51105522090. Its totient is φ = 51105522088.

The previous prime is 51105522073. The next prime is 51105522113. The reversal of 51105522089 is 98022550115.

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., 35529234064 + 15576288025 = 188492^2 + 124805^2 .

It is a cyclic number.

It is not a de Polignac number, because 51105522089 - 2⁴ = 51105522073 is a prime.

It is a super-2 number, since 2×51105522089² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51105522019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552761044 + 25552761045.

It is an arithmetic number, because the mean of its divisors is an integer number (25552761045).

Almost surely, 2^51105522089 is an apocalyptic number.

It is an amenable number.

51105522089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105522089 is an equidigital number, since it uses as much as digits as its factorization.

51105522089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 51105522089 in words is "fifty-one billion, one hundred five million, five hundred twenty-two thousand, eighty-nine".