51791291 has 2 divisors, whose sum is σ = 51791292. Its totient is φ = 51791290.

The previous prime is 51791287. The next prime is 51791293. The reversal of 51791291 is 19219715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51791291 - 2² = 51791287 is a prime.

Together with 51791293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51791293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25895645 + 25895646.

It is an arithmetic number, because the mean of its divisors is an integer number (25895646).

Almost surely, 2^51791291 is an apocalyptic number.

51791291 is a deficient number, since it is larger than the sum of its proper divisors (1).

51791291 is an equidigital number, since it uses as much as digits as its factorization.

51791291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 35.

The square root of 51791291 is about 7196.6166356143. The cubic root of 51791291 is about 372.7510815664.

The spelling of 51791291 in words is "fifty-one million, seven hundred ninety-one thousand, two hundred ninety-one".