51234349181 has 2 divisors, whose sum is σ = 51234349182. Its totient is φ = 51234349180.

The previous prime is 51234349147. The next prime is 51234349207. The reversal of 51234349181 is 18194343215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41302432900 + 9931916281 = 203230^2 + 99659^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234349181 - 2²⁶ = 51167240317 is a prime.

It is a super-2 number, since 2×51234349181² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51234349081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617174590 + 25617174591.

It is an arithmetic number, because the mean of its divisors is an integer number (25617174591).

Almost surely, 2^51234349181 is an apocalyptic number.

It is an amenable number.

51234349181 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234349181 is an equidigital number, since it uses as much as digits as its factorization.

51234349181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The spelling of 51234349181 in words is "fifty-one billion, two hundred thirty-four million, three hundred forty-nine thousand, one hundred eighty-one".