51433045421 has 2 divisors, whose sum is σ = 51433045422. Its totient is φ = 51433045420.

The previous prime is 51433045409. The next prime is 51433045423. The reversal of 51433045421 is 12454033415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51431889796 + 1155625 = 226786^2 + 1075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51433045421 is a prime.

It is a super-2 number, since 2×51433045421² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 51433045423, it forms a pair of twin primes.

It is a Chen 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 (51433045423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25716522710 + 25716522711.

It is an arithmetic number, because the mean of its divisors is an integer number (25716522711).

Almost surely, 2^51433045421 is an apocalyptic number.

It is an amenable number.

51433045421 is a deficient number, since it is larger than the sum of its proper divisors (1).

51433045421 is an equidigital number, since it uses as much as digits as its factorization.

51433045421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 51433045421 its reverse (12454033415), we get a palindrome (63887078836).

The spelling of 51433045421 in words is "fifty-one billion, four hundred thirty-three million, forty-five thousand, four hundred twenty-one".