213211144 has 16 divisors (see below), whose sum is σ = 423287100. Its totient is φ = 100334592.

The previous prime is 213211139. The next prime is 213211151. The reversal of 213211144 is 441112312.

213211144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159012100 + 54199044 = 12610^2 + 7362^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 783729 + ... + 784000.

Almost surely, 2^213211144 is an apocalyptic number.

It is an amenable number.

213211144 is a deficient number, since it is larger than the sum of its proper divisors (210075956).

213211144 is a wasteful number, since it uses less digits than its factorization.

213211144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567752 (or 1567748 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 213211144 is about 14601.7514018011. The cubic root of 213211144 is about 597.4065319501.

Adding to 213211144 its reverse (441112312), we get a palindrome (654323456).

The spelling of 213211144 in words is "two hundred thirteen million, two hundred eleven thousand, one hundred forty-four".