213440450 has 12 divisors (see below), whose sum is σ = 396999330. Its totient is φ = 85376160.

The previous prime is 213440441. The next prime is 213440453. The reversal of 213440450 is 54044312.

It can be written as a sum of positive squares in 3 ways, for example, as 190467601 + 22972849 = 13801^2 + 4793^2 .

It is not an unprimeable number, because it can be changed into a prime (213440453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2134355 + ... + 2134454.

Almost surely, 2^213440450 is an apocalyptic number.

213440450 is a deficient number, since it is larger than the sum of its proper divisors (183558880).

213440450 is a wasteful number, since it uses less digits than its factorization.

213440450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268821 (or 4268816 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 213440450 is about 14609.6012950388. The cubic root of 213440450 is about 597.6206230447.

Adding to 213440450 its reverse (54044312), we get a palindrome (267484762).

The spelling of 213440450 in words is "two hundred thirteen million, four hundred forty thousand, four hundred fifty".