45331209 has 24 divisors (see below), whose sum is σ = 81636672. Its totient is φ = 23548320.

The previous prime is 45331151. The next prime is 45331241. The reversal of 45331209 is 90213354.

45331209 is a `hidden beast` number, since 4 + 533 + 120 + 9 = 666.

45331209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45331209 - 2¹⁷ = 45200137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45331249) 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 in 23 ways as a sum of consecutive naturals, for example, 32014 + ... + 33399.

It is an arithmetic number, because the mean of its divisors is an integer number (3401528).

Almost surely, 2^45331209 is an apocalyptic number.

It is an amenable number.

45331209 is a deficient number, since it is larger than the sum of its proper divisors (36305463).

45331209 is a wasteful number, since it uses less digits than its factorization.

45331209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65437 (or 65434 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 45331209 is about 6732.8455351359. The cubic root of 45331209 is about 356.5598464089.

The spelling of 45331209 in words is "forty-five million, three hundred thirty-one thousand, two hundred nine".