51147934429 has 2 divisors, whose sum is σ = 51147934430. Its totient is φ = 51147934428.

The previous prime is 51147934427. The next prime is 51147934441. The reversal of 51147934429 is 92443974115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43635032100 + 7512902329 = 208890^2 + 86677^2 .

It is a cyclic number.

It is not a de Polignac number, because 51147934429 - 2¹ = 51147934427 is a prime.

It is a super-2 number, since 2×51147934429² (a number of 22 digits) contains 22 as substring.

Together with 51147934427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51147934423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25573967214 + 25573967215.

It is an arithmetic number, because the mean of its divisors is an integer number (25573967215).

Almost surely, 2^51147934429 is an apocalyptic number.

It is an amenable number.

51147934429 is a deficient number, since it is larger than the sum of its proper divisors (1).

51147934429 is an equidigital number, since it uses as much as digits as its factorization.

51147934429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The spelling of 51147934429 in words is "fifty-one billion, one hundred forty-seven million, nine hundred thirty-four thousand, four hundred twenty-nine".