53451809 has 2 divisors, whose sum is σ = 53451810. Its totient is φ = 53451808.

The previous prime is 53451787. The next prime is 53451821. The reversal of 53451809 is 90815435.

53451809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48344209 + 5107600 = 6953^2 + 2260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53451809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53451829) 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, 26725904 + 26725905.

It is an arithmetic number, because the mean of its divisors is an integer number (26725905).

Almost surely, 2^53451809 is an apocalyptic number.

It is an amenable number.

53451809 is a deficient number, since it is larger than the sum of its proper divisors (1).

53451809 is an equidigital number, since it uses as much as digits as its factorization.

53451809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 53451809 is about 7311.0744080470. The cubic root of 53451809 is about 376.6929300959.

The spelling of 53451809 in words is "fifty-three million, four hundred fifty-one thousand, eight hundred nine".