213324445 has 16 divisors (see below), whose sum is σ = 259182000. Its totient is φ = 168542208.

The previous prime is 213324443. The next prime is 213324467. The reversal of 213324445 is 544423312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4435236 + 208889209 = 2106^2 + 14453^2 .

It is a cyclic number.

It is not a de Polignac number, because 213324445 - 2¹ = 213324443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213324443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277021 + ... + 277789.

It is an arithmetic number, because the mean of its divisors is an integer number (16198875).

Almost surely, 2^213324445 is an apocalyptic number.

It is an amenable number.

213324445 is a deficient number, since it is larger than the sum of its proper divisors (45857555).

213324445 is a wasteful number, since it uses less digits than its factorization.

213324445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392.

The product of its digits is 11520, while the sum is 28.

The square root of 213324445 is about 14605.6305923435. The cubic root of 213324445 is about 597.5123343800.

Adding to 213324445 its reverse (544423312), we get a palindrome (757747757).

The spelling of 213324445 in words is "two hundred thirteen million, three hundred twenty-four thousand, four hundred forty-five".