51802469 has 2 divisors, whose sum is σ = 51802470. Its totient is φ = 51802468.

The previous prime is 51802459. The next prime is 51802489. The reversal of 51802469 is 96420815.

51802469 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., 47128225 + 4674244 = 6865^2 + 2162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51802469 is a prime.

It is a super-2 number, since 2×51802469² = 5366991588991922, which contains 22 as substring.

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 (51802409) 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, 25901234 + 25901235.

It is an arithmetic number, because the mean of its divisors is an integer number (25901235).

Almost surely, 2^51802469 is an apocalyptic number.

It is an amenable number.

51802469 is a deficient number, since it is larger than the sum of its proper divisors (1).

51802469 is an equidigital number, since it uses as much as digits as its factorization.

51802469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 51802469 is about 7197.3932086555. The cubic root of 51802469 is about 372.7778963184. Note that the first 3 decimals are identical.

The spelling of 51802469 in words is "fifty-one million, eight hundred two thousand, four hundred sixty-nine".