51011071 has 2 divisors, whose sum is σ = 51011072. Its totient is φ = 51011070.

The previous prime is 51011057. The next prime is 51011113. The reversal of 51011071 is 17011015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51011071 - 2⁹ = 51010559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51011041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505535 + 25505536.

It is an arithmetic number, because the mean of its divisors is an integer number (25505536).

Almost surely, 2^51011071 is an apocalyptic number.

51011071 is a deficient number, since it is larger than the sum of its proper divisors (1).

51011071 is an equidigital number, since it uses as much as digits as its factorization.

51011071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35, while the sum is 16.

The square root of 51011071 is about 7142.2035115222. The cubic root of 51011071 is about 370.8698089891.

Adding to 51011071 its reverse (17011015), we get a palindrome (68022086).

The spelling of 51011071 in words is "fifty-one million, eleven thousand, seventy-one".