45180209 has 2 divisors, whose sum is σ = 45180210. Its totient is φ = 45180208.

The previous prime is 45180193. The next prime is 45180217. The reversal of 45180209 is 90208154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44930209 + 250000 = 6703^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 45180209 - 2⁴ = 45180193 is a prime.

It is not a weakly prime, because it can be changed into another prime (45180259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22590104 + 22590105.

It is an arithmetic number, because the mean of its divisors is an integer number (22590105).

Almost surely, 2^45180209 is an apocalyptic number.

It is an amenable number.

45180209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45180209 is an equidigital number, since it uses as much as digits as its factorization.

45180209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 45180209 is about 6721.6224975820. The cubic root of 45180209 is about 356.1635011499.

The spelling of 45180209 in words is "forty-five million, one hundred eighty thousand, two hundred nine".