51611171 has 2 divisors, whose sum is σ = 51611172. Its totient is φ = 51611170.

The previous prime is 51611159. The next prime is 51611177. The reversal of 51611171 is 17111615.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51611171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51611177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25805585 + 25805586.

It is an arithmetic number, because the mean of its divisors is an integer number (25805586).

Almost surely, 2^51611171 is an apocalyptic number.

51611171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51611171 is an equidigital number, since it uses as much as digits as its factorization.

51611171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 210, while the sum is 23.

The square root of 51611171 is about 7184.0915222455. The cubic root of 51611171 is about 372.3184611558.

Adding to 51611171 its reverse (17111615), we get a palindrome (68722786).

The spelling of 51611171 in words is "fifty-one million, six hundred eleven thousand, one hundred seventy-one".