51134440109 has 2 divisors, whose sum is σ = 51134440110. Its totient is φ = 51134440108.

The previous prime is 51134440081. The next prime is 51134440111. The reversal of 51134440109 is 90104443115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48913957225 + 2220482884 = 221165^2 + 47122^2 .

It is a cyclic number.

It is not a de Polignac number, because 51134440109 - 2¹⁶ = 51134374573 is a prime.

It is a super-2 number, since 2×51134440109² (a number of 22 digits) contains 22 as substring.

Together with 51134440111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51134440009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25567220054 + 25567220055.

It is an arithmetic number, because the mean of its divisors is an integer number (25567220055).

Almost surely, 2^51134440109 is an apocalyptic number.

It is an amenable number.

51134440109 is a deficient number, since it is larger than the sum of its proper divisors (1).

51134440109 is an equidigital number, since it uses as much as digits as its factorization.

51134440109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 51134440109 in words is "fifty-one billion, one hundred thirty-four million, four hundred forty thousand, one hundred nine".