4521213205 has 4 divisors (see below), whose sum is σ = 5425455852. Its totient is φ = 3616970560.

The previous prime is 4521213167. The next prime is 4521213217. The reversal of 4521213205 is 5023121254.

4521213205 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1491040996 + 3030172209 = 38614^2 + 55047^2 .

It is not a de Polignac number, because 4521213205 - 2¹⁵ = 4521180437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4521213205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452121316 + ... + 452121325.

It is an arithmetic number, because the mean of its divisors is an integer number (1356363963).

Almost surely, 2^4521213205 is an apocalyptic number.

It is an amenable number.

4521213205 is a deficient number, since it is larger than the sum of its proper divisors (904242647).

4521213205 is an equidigital number, since it uses as much as digits as its factorization.

4521213205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904242646.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4521213205 is about 67239.9673185524. The cubic root of 4521213205 is about 1653.5537978812.

Adding to 4521213205 its reverse (5023121254), we get a palindrome (9544334459).

The spelling of 4521213205 in words is "four billion, five hundred twenty-one million, two hundred thirteen thousand, two hundred five".