51057191 has 2 divisors, whose sum is σ = 51057192. Its totient is φ = 51057190.

The previous prime is 51057173. The next prime is 51057221. The reversal of 51057191 is 19175015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51057191 - 2¹⁰ = 51056167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51057121) 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, 25528595 + 25528596.

It is an arithmetic number, because the mean of its divisors is an integer number (25528596).

Almost surely, 2^51057191 is an apocalyptic number.

51057191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51057191 is an equidigital number, since it uses as much as digits as its factorization.

51057191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 51057191 is about 7145.4314775246. The cubic root of 51057191 is about 370.9815452783.

The spelling of 51057191 in words is "fifty-one million, fifty-seven thousand, one hundred ninety-one".