545440213 has 2 divisors, whose sum is σ = 545440214. Its totient is φ = 545440212.

The previous prime is 545440211. The next prime is 545440219. The reversal of 545440213 is 312044545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483692049 + 61748164 = 21993^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 545440213 - 2¹ = 545440211 is a prime.

Together with 545440211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545440211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272720106 + 272720107.

It is an arithmetic number, because the mean of its divisors is an integer number (272720107).

Almost surely, 2^545440213 is an apocalyptic number.

It is an amenable number.

545440213 is a deficient number, since it is larger than the sum of its proper divisors (1).

545440213 is an equidigital number, since it uses as much as digits as its factorization.

545440213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 545440213 is about 23354.6614833099. The cubic root of 545440213 is about 817.0507841970.

Adding to 545440213 its reverse (312044545), we get a palindrome (857484758).

The spelling of 545440213 in words is "five hundred forty-five million, four hundred forty thousand, two hundred thirteen".