51045791 has 2 divisors, whose sum is σ = 51045792. Its totient is φ = 51045790.

The previous prime is 51045769. The next prime is 51045793. The reversal of 51045791 is 19754015.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51045791 is a prime.

Together with 51045793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51045793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25522895 + 25522896.

It is an arithmetic number, because the mean of its divisors is an integer number (25522896).

Almost surely, 2^51045791 is an apocalyptic number.

51045791 is a deficient number, since it is larger than the sum of its proper divisors (1).

51045791 is an equidigital number, since it uses as much as digits as its factorization.

51045791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 51045791 is about 7144.6337204926. The cubic root of 51045791 is about 370.9539324234.

The spelling of 51045791 in words is "fifty-one million, forty-five thousand, seven hundred ninety-one".