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45213809 is a prime number
BaseRepresentation
bin1010110001111…
…0100001110001
310011002002200112
42230132201301
543033320214
64253031105
71056211454
oct254364161
9104062615
1045213809
1123581893
1213185495
1394a0a44
14600d49b
153e81a3e
hex2b1e871

45213809 has 2 divisors, whose sum is σ = 45213810. Its totient is φ = 45213808.

The previous prime is 45213793. The next prime is 45213827. The reversal of 45213809 is 90831254.

45213809 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., 34845409 + 10368400 = 5903^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 45213809 - 24 = 45213793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45213109) 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, 22606904 + 22606905.

It is an arithmetic number, because the mean of its divisors is an integer number (22606905).

Almost surely, 245213809 is an apocalyptic number.

It is an amenable number.

45213809 is a deficient number, since it is larger than the sum of its proper divisors (1).

45213809 is an equidigital number, since it uses as much as digits as its factorization.

45213809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 45213809 is about 6724.1214295996. The cubic root of 45213809 is about 356.2517708335.

The spelling of 45213809 in words is "forty-five million, two hundred thirteen thousand, eight hundred nine".