51516071 has 2 divisors, whose sum is σ = 51516072. Its totient is φ = 51516070.

The previous prime is 51516043. The next prime is 51516077. The reversal of 51516071 is 17061515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51516071 - 2¹⁰ = 51515047 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51516071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51516077) 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, 25758035 + 25758036.

It is an arithmetic number, because the mean of its divisors is an integer number (25758036).

Almost surely, 2^51516071 is an apocalyptic number.

51516071 is a deficient number, since it is larger than the sum of its proper divisors (1).

51516071 is an equidigital number, since it uses as much as digits as its factorization.

51516071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 51516071 is about 7177.4696794901. The cubic root of 51516071 is about 372.0896395343.

Adding to 51516071 its reverse (17061515), we get a palindrome (68577586).

The spelling of 51516071 in words is "fifty-one million, five hundred sixteen thousand, seventy-one".