51163169 has 2 divisors, whose sum is σ = 51163170. Its totient is φ = 51163168.

The previous prime is 51163139. The next prime is 51163171. The reversal of 51163169 is 96136115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36240400 + 14922769 = 6020^2 + 3863^2 .

It is a cyclic number.

It is not a de Polignac number, because 51163169 - 2⁸ = 51162913 is a prime.

It is a super-2 number, since 2×51163169² = 5235339724245122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 51163171, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51163129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25581584 + 25581585.

It is an arithmetic number, because the mean of its divisors is an integer number (25581585).

Almost surely, 2^51163169 is an apocalyptic number.

It is an amenable number.

51163169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51163169 is an equidigital number, since it uses as much as digits as its factorization.

51163169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 51163169 is about 7152.8434206265. The cubic root of 51163169 is about 371.2380466020.

The spelling of 51163169 in words is "fifty-one million, one hundred sixty-three thousand, one hundred sixty-nine".