51217571 has 2 divisors, whose sum is σ = 51217572. Its totient is φ = 51217570.

The previous prime is 51217553. The next prime is 51217609. The reversal of 51217571 is 17571215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51217571 - 2¹⁴ = 51201187 is a prime.

It is not a weakly prime, because it can be changed into another prime (51217501) 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, 25608785 + 25608786.

It is an arithmetic number, because the mean of its divisors is an integer number (25608786).

Almost surely, 2^51217571 is an apocalyptic number.

51217571 is a deficient number, since it is larger than the sum of its proper divisors (1).

51217571 is an equidigital number, since it uses as much as digits as its factorization.

51217571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2450, while the sum is 29.

The square root of 51217571 is about 7156.6452336273. The cubic root of 51217571 is about 371.3695796210.

Adding to 51217571 its reverse (17571215), we get a palindrome (68788786).

The spelling of 51217571 in words is "fifty-one million, two hundred seventeen thousand, five hundred seventy-one".