51040169 has 2 divisors, whose sum is σ = 51040170. Its totient is φ = 51040168.

The previous prime is 51040153. The next prime is 51040181. The reversal of 51040169 is 96104015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28761769 + 22278400 = 5363^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 51040169 - 2⁴ = 51040153 is a prime.

It is a super-3 number, since 3×51040169³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51042169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25520084 + 25520085.

It is an arithmetic number, because the mean of its divisors is an integer number (25520085).

Almost surely, 2^51040169 is an apocalyptic number.

It is an amenable number.

51040169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51040169 is an equidigital number, since it uses as much as digits as its factorization.

51040169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 51040169 is about 7144.2402675162. The cubic root of 51040169 is about 370.9403134123.

The spelling of 51040169 in words is "fifty-one million, forty thousand, one hundred sixty-nine".