51516571 has 2 divisors, whose sum is σ = 51516572. Its totient is φ = 51516570.

The previous prime is 51516551. The next prime is 51516593. The reversal of 51516571 is 17561515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51516571 - 2⁵ = 51516539 is a prime.

It is not a weakly prime, because it can be changed into another prime (51516551) 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, 25758285 + 25758286.

It is an arithmetic number, because the mean of its divisors is an integer number (25758286).

Almost surely, 2^51516571 is an apocalyptic number.

51516571 is a deficient number, since it is larger than the sum of its proper divisors (1).

51516571 is an equidigital number, since it uses as much as digits as its factorization.

51516571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 31.

The square root of 51516571 is about 7177.5045106221. The cubic root of 51516571 is about 372.0908433283.

The spelling of 51516571 in words is "fifty-one million, five hundred sixteen thousand, five hundred seventy-one".