51171319 has 2 divisors, whose sum is σ = 51171320. Its totient is φ = 51171318.

The previous prime is 51171311. The next prime is 51171331. The reversal of 51171319 is 91317115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51171319 - 2³ = 51171311 is a prime.

It is a super-2 number, since 2×51171319² = 5237007776399522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51171311) 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, 25585659 + 25585660.

It is an arithmetic number, because the mean of its divisors is an integer number (25585660).

Almost surely, 2^51171319 is an apocalyptic number.

51171319 is a deficient number, since it is larger than the sum of its proper divisors (1).

51171319 is an equidigital number, since it uses as much as digits as its factorization.

51171319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945, while the sum is 28.

The square root of 51171319 is about 7153.4131014502. The cubic root of 51171319 is about 371.2577575875.

The spelling of 51171319 in words is "fifty-one million, one hundred seventy-one thousand, three hundred nineteen".