51295091 has 2 divisors, whose sum is σ = 51295092. Its totient is φ = 51295090.

The previous prime is 51295063. The next prime is 51295099. The reversal of 51295091 is 19059215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51295091 - 2²² = 47100787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51295099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25647545 + 25647546.

It is an arithmetic number, because the mean of its divisors is an integer number (25647546).

Almost surely, 2^51295091 is an apocalyptic number.

51295091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51295091 is an equidigital number, since it uses as much as digits as its factorization.

51295091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 51295091 is about 7162.0591312834. The cubic root of 51295091 is about 371.5568464594.

The spelling of 51295091 in words is "fifty-one million, two hundred ninety-five thousand, ninety-one".