51342554430521 has 2 divisors, whose sum is σ = 51342554430522. Its totient is φ = 51342554430520.

The previous prime is 51342554430509. The next prime is 51342554430529. The reversal of 51342554430521 is 12503445524315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39922987319296 + 11419567111225 = 6318464^2 + 3379285^2 .

It is a cyclic number.

It is not a de Polignac number, because 51342554430521 - 2¹⁰ = 51342554429497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51342554430529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25671277215260 + 25671277215261.

It is an arithmetic number, because the mean of its divisors is an integer number (25671277215261).

Almost surely, 2^{51342554430521} is an apocalyptic number.

It is an amenable number.

51342554430521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51342554430521 is an equidigital number, since it uses as much as digits as its factorization.

51342554430521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 51342554430521 its reverse (12503445524315), we get a palindrome (63845999954836).

The spelling of 51342554430521 in words is "fifty-one trillion, three hundred forty-two billion, five hundred fifty-four million, four hundred thirty thousand, five hundred twenty-one".