51946617251 has 2 divisors, whose sum is σ = 51946617252. Its totient is φ = 51946617250.

The previous prime is 51946617211. The next prime is 51946617263. The reversal of 51946617251 is 15271664915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51946617251 - 2²² = 51942422947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51946617196 and 51946617205.

It is not a weakly prime, because it can be changed into another prime (51946617211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25973308625 + 25973308626.

It is an arithmetic number, because the mean of its divisors is an integer number (25973308626).

Almost surely, 2^51946617251 is an apocalyptic number.

51946617251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51946617251 is an equidigital number, since it uses as much as digits as its factorization.

51946617251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 47.

The spelling of 51946617251 in words is "fifty-one billion, nine hundred forty-six million, six hundred seventeen thousand, two hundred fifty-one".