51171211 has 16 divisors (see below), whose sum is σ = 63234304. Its totient is φ = 40323744.

The previous prime is 51171193. The next prime is 51171229. The reversal of 51171211 is 11217115.

It is an interprime number because it is at equal distance from previous prime (51171193) and next prime (51171229).

It is a cyclic number.

It is not a de Polignac number, because 51171211 - 2⁵ = 51171179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51171271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24760 + ... + 26746.

It is an arithmetic number, because the mean of its divisors is an integer number (3952144).

Almost surely, 2^51171211 is an apocalyptic number.

51171211 is a deficient number, since it is larger than the sum of its proper divisors (12063093).

51171211 is a wasteful number, since it uses less digits than its factorization.

51171211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290.

The product of its digits is 70, while the sum is 19.

The square root of 51171211 is about 7153.4055526022. The cubic root of 51171211 is about 371.2574964004.

Adding to 51171211 its reverse (11217115), we get a palindrome (62388326).

It can be divided in two parts, 5117 and 1211, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 51171211 in words is "fifty-one million, one hundred seventy-one thousand, two hundred eleven".