213245644 has 12 divisors (see below), whose sum is σ = 373369024. Its totient is φ = 106568784.

The previous prime is 213245611. The next prime is 213245663. The reversal of 213245644 is 446542312.

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, 3867 + ... + 21010.

Almost surely, 2^213245644 is an apocalyptic number.

It is an amenable number.

213245644 is a deficient number, since it is larger than the sum of its proper divisors (160123380).

213245644 is a wasteful number, since it uses less digits than its factorization.

213245644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27024 (or 27022 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 213245644 is about 14602.9327191493. The cubic root of 213245644 is about 597.4387526139.

Adding to 213245644 its reverse (446542312), we get a palindrome (659787956).

The spelling of 213245644 in words is "two hundred thirteen million, two hundred forty-five thousand, six hundred forty-four".