51212555357 has 2 divisors, whose sum is σ = 51212555358. Its totient is φ = 51212555356.

The previous prime is 51212555353. The next prime is 51212555393. The reversal of 51212555357 is 75355521215.

It is a happy number.

51212555357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50753781796 + 458773561 = 225286^2 + 21419^2 .

It is a cyclic number.

It is not a de Polignac number, because 51212555357 - 2² = 51212555353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51212555353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606277678 + 25606277679.

It is an arithmetic number, because the mean of its divisors is an integer number (25606277679).

Almost surely, 2^51212555357 is an apocalyptic number.

It is an amenable number.

51212555357 is a deficient number, since it is larger than the sum of its proper divisors (1).

51212555357 is an equidigital number, since it uses as much as digits as its factorization.

51212555357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262500, while the sum is 41.

The spelling of 51212555357 in words is "fifty-one billion, two hundred twelve million, five hundred fifty-five thousand, three hundred fifty-seven".