45102209 has 2 divisors, whose sum is σ = 45102210. Its totient is φ = 45102208.

The previous prime is 45102199. The next prime is 45102217. The reversal of 45102209 is 90220154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41319184 + 3783025 = 6428^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 45102209 - 2⁴ = 45102193 is a prime.

It is not a weakly prime, because it can be changed into another prime (45102229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22551104 + 22551105.

It is an arithmetic number, because the mean of its divisors is an integer number (22551105).

Almost surely, 2^45102209 is an apocalyptic number.

It is an amenable number.

45102209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45102209 is an equidigital number, since it uses as much as digits as its factorization.

45102209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 45102209 is about 6715.8178206381. The cubic root of 45102209 is about 355.9584205321.

The spelling of 45102209 in words is "forty-five million, one hundred two thousand, two hundred nine".