51693269 has 2 divisors, whose sum is σ = 51693270. Its totient is φ = 51693268.

The previous prime is 51693253. The next prime is 51693377. The reversal of 51693269 is 96239615.

51693269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 12780625 = 6238^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 51693269 - 2⁴ = 51693253 is a prime.

It is a super-3 number, since 3×51693269³ (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 a congruent number.

It is not a weakly prime, because it can be changed into another prime (51693569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25846634 + 25846635.

It is an arithmetic number, because the mean of its divisors is an integer number (25846635).

Almost surely, 2^51693269 is an apocalyptic number.

It is an amenable number.

51693269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51693269 is an equidigital number, since it uses as much as digits as its factorization.

51693269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The square root of 51693269 is about 7189.8031266510. The cubic root of 51693269 is about 372.5157724955.

The spelling of 51693269 in words is "fifty-one million, six hundred ninety-three thousand, two hundred sixty-nine".