51571171 has 2 divisors, whose sum is σ = 51571172. Its totient is φ = 51571170.

The previous prime is 51571159. The next prime is 51571189. The reversal of 51571171 is 17117515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51571171 - 2⁷ = 51571043 is a prime.

It is a super-2 number, since 2×51571171² = 5319171356622482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51581171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25785585 + 25785586.

It is an arithmetic number, because the mean of its divisors is an integer number (25785586).

Almost surely, 2^51571171 is an apocalyptic number.

51571171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51571171 is an equidigital number, since it uses as much as digits as its factorization.

51571171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1225, while the sum is 28.

The square root of 51571171 is about 7181.3070537333. The cubic root of 51571171 is about 372.2222507991. Note that the first 4 decimals are identical.

Adding to 51571171 its reverse (17117515), we get a palindrome (68688686).

It can be divided in two parts, 5157 and 1171, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 51571171 in words is "fifty-one million, five hundred seventy-one thousand, one hundred seventy-one".