51212555393 has 2 divisors, whose sum is σ = 51212555394. Its totient is φ = 51212555392.

The previous prime is 51212555357. The next prime is 51212555399. The reversal of 51212555393 is 39355521215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34409137009 + 16803418384 = 185497^2 + 129628^2 .

It is a cyclic number.

It is not a de Polignac number, because 51212555393 - 2²² = 51208361089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51212555393.

It is not a weakly prime, because it can be changed into another prime (51212555399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606277696 + 25606277697.

It is an arithmetic number, because the mean of its divisors is an integer number (25606277697).

Almost surely, 2^51212555393 is an apocalyptic number.

It is an amenable number.

51212555393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51212555393 is an equidigital number, since it uses as much as digits as its factorization.

51212555393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 202500, while the sum is 41.

The spelling of 51212555393 in words is "fifty-one billion, two hundred twelve million, five hundred fifty-five thousand, three hundred ninety-three".