51102326809 has 2 divisors, whose sum is σ = 51102326810. Its totient is φ = 51102326808.

The previous prime is 51102326747. The next prime is 51102326839. The reversal of 51102326809 is 90862320115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47963190025 + 3139136784 = 219005^2 + 56028^2 .

It is a cyclic number.

It is not a de Polignac number, because 51102326809 - 2²¹ = 51100229657 is a prime.

It is a super-2 number, since 2×51102326809² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51102326839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25551163404 + 25551163405.

It is an arithmetic number, because the mean of its divisors is an integer number (25551163405).

Almost surely, 2^51102326809 is an apocalyptic number.

It is an amenable number.

51102326809 is a deficient number, since it is larger than the sum of its proper divisors (1).

51102326809 is an equidigital number, since it uses as much as digits as its factorization.

51102326809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 51102326809 in words is "fifty-one billion, one hundred two million, three hundred twenty-six thousand, eight hundred nine".