51055308251 has 2 divisors, whose sum is σ = 51055308252. Its totient is φ = 51055308250.

The previous prime is 51055308221. The next prime is 51055308257. The reversal of 51055308251 is 15280355015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51055308251 - 2²² = 51051113947 is a prime.

It is not a weakly prime, because it can be changed into another prime (51055308257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527654125 + 25527654126.

It is an arithmetic number, because the mean of its divisors is an integer number (25527654126).

Almost surely, 2^51055308251 is an apocalyptic number.

51055308251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51055308251 is an equidigital number, since it uses as much as digits as its factorization.

51055308251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 51055308251 in words is "fifty-one billion, fifty-five million, three hundred eight thousand, two hundred fifty-one".