45218213 has 2 divisors, whose sum is σ = 45218214. Its totient is φ = 45218212.

The previous prime is 45218189. The next prime is 45218219. The reversal of 45218213 is 31281254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44328964 + 889249 = 6658^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 45218213 - 2⁶ = 45218149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45218219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22609106 + 22609107.

It is an arithmetic number, because the mean of its divisors is an integer number (22609107).

Almost surely, 2^45218213 is an apocalyptic number.

It is an amenable number.

45218213 is a deficient number, since it is larger than the sum of its proper divisors (1).

45218213 is an equidigital number, since it uses as much as digits as its factorization.

45218213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 45218213 is about 6724.4488993523. The cubic root of 45218213 is about 356.2633372251.

Adding to 45218213 its reverse (31281254), we get a palindrome (76499467).

The spelling of 45218213 in words is "forty-five million, two hundred eighteen thousand, two hundred thirteen".