51113342257 has 2 divisors, whose sum is σ = 51113342258. Its totient is φ = 51113342256.

The previous prime is 51113342251. The next prime is 51113342317. The reversal of 51113342257 is 75224331115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28153819681 + 22959522576 = 167791^2 + 151524^2 .

It is a cyclic number.

It is not a de Polignac number, because 51113342257 - 2¹¹ = 51113340209 is a prime.

It is a super-2 number, since 2×51113342257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51113342251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556671128 + 25556671129.

It is an arithmetic number, because the mean of its divisors is an integer number (25556671129).

Almost surely, 2^51113342257 is an apocalyptic number.

It is an amenable number.

51113342257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113342257 is an equidigital number, since it uses as much as digits as its factorization.

51113342257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The spelling of 51113342257 in words is "fifty-one billion, one hundred thirteen million, three hundred forty-two thousand, two hundred fifty-seven".