213205450 has 12 divisors (see below), whose sum is σ = 396562230. Its totient is φ = 85282160.

The previous prime is 213205439. The next prime is 213205451. The reversal of 213205450 is 54502312.

It can be written as a sum of positive squares in 3 ways, for example, as 161264601 + 51940849 = 12699^2 + 7207^2 .

It is not an unprimeable number, because it can be changed into a prime (213205451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2132005 + ... + 2132104.

Almost surely, 2^213205450 is an apocalyptic number.

213205450 is a deficient number, since it is larger than the sum of its proper divisors (183356780).

213205450 is a wasteful number, since it uses less digits than its factorization.

213205450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264121 (or 4264116 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 213205450 is about 14601.5564238885. The cubic root of 213205450 is about 597.4012138055.

Adding to 213205450 its reverse (54502312), we get a palindrome (267707762).

The spelling of 213205450 in words is "two hundred thirteen million, two hundred five thousand, four hundred fifty".