51169 has 2 divisors, whose sum is σ = 51170. Its totient is φ = 51168.

The previous prime is 51157. The next prime is 51193. The reversal of 51169 is 96115.

51169 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32400 + 18769 = 180^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 51169 - 2⁵ = 51137 is a prime.

It is a super-2 number, since 2×51169² = 5236533122, which contains 22 as substring.

51169 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (51109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25584 + 25585.

It is an arithmetic number, because the mean of its divisors is an integer number (25585).

2⁵¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

51169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51169 is an equidigital number, since it uses as much as digits as its factorization.

51169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 22.

The square root of 51169 is about 226.2056586383. The cubic root of 51169 is about 37.1252149239.

The spelling of 51169 in words is "fifty-one thousand, one hundred sixty-nine".