51043350521 has 2 divisors, whose sum is σ = 51043350522. Its totient is φ = 51043350520.

The previous prime is 51043350517. The next prime is 51043350539. The reversal of 51043350521 is 12505334015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37386156025 + 13657194496 = 193355^2 + 116864^2 .

It is a cyclic number.

It is not a de Polignac number, because 51043350521 - 2² = 51043350517 is a prime.

It is not a weakly prime, because it can be changed into another prime (51043350581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25521675260 + 25521675261.

It is an arithmetic number, because the mean of its divisors is an integer number (25521675261).

Almost surely, 2^51043350521 is an apocalyptic number.

It is an amenable number.

51043350521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51043350521 is an equidigital number, since it uses as much as digits as its factorization.

51043350521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 51043350521 its reverse (12505334015), we get a palindrome (63548684536).

The spelling of 51043350521 in words is "fifty-one billion, forty-three million, three hundred fifty thousand, five hundred twenty-one".