51965791 has 2 divisors, whose sum is σ = 51965792. Its totient is φ = 51965790.

The previous prime is 51965789. The next prime is 51965857. The reversal of 51965791 is 19756915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51965791 - 2¹ = 51965789 is a prime.

Together with 51965789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51965701) 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, 25982895 + 25982896.

It is an arithmetic number, because the mean of its divisors is an integer number (25982896).

Almost surely, 2^51965791 is an apocalyptic number.

51965791 is a deficient number, since it is larger than the sum of its proper divisors (1).

51965791 is an equidigital number, since it uses as much as digits as its factorization.

51965791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 43.

The square root of 51965791 is about 7208.7301933142. The cubic root of 51965791 is about 373.1692480636.

The spelling of 51965791 in words is "fifty-one million, nine hundred sixty-five thousand, seven hundred ninety-one".