51256171 has 2 divisors, whose sum is σ = 51256172. Its totient is φ = 51256170.

The previous prime is 51256169. The next prime is 51256181. The reversal of 51256171 is 17165215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51256171 - 2¹ = 51256169 is a prime.

Together with 51256169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51256151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628085 + 25628086.

It is an arithmetic number, because the mean of its divisors is an integer number (25628086).

Almost surely, 2^51256171 is an apocalyptic number.

51256171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256171 is an equidigital number, since it uses as much as digits as its factorization.

51256171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 28.

The square root of 51256171 is about 7159.3415200003. The cubic root of 51256171 is about 371.4628501260.

The spelling of 51256171 in words is "fifty-one million, two hundred fifty-six thousand, one hundred seventy-one".