211232144 has 10 divisors (see below), whose sum is σ = 409262310. Its totient is φ = 105616064.

The previous prime is 211232141. The next prime is 211232179. The reversal of 211232144 is 441232112.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 16908544 = 13940^2 + 4112^2 .

It is not an unprimeable number, because it can be changed into a prime (211232141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600989 + ... + 6601020.

It is an arithmetic number, because the mean of its divisors is an integer number (40926231).

Almost surely, 2^211232144 is an apocalyptic number.

It is an amenable number.

211232144 is a deficient number, since it is larger than the sum of its proper divisors (198030166).

211232144 is a wasteful number, since it uses less digits than its factorization.

211232144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13202017 (or 13202011 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 211232144 is about 14533.8275756939. The cubic root of 211232144 is about 595.5524318747.

Adding to 211232144 its reverse (441232112), we get a palindrome (652464256).

The spelling of 211232144 in words is "two hundred eleven million, two hundred thirty-two thousand, one hundred forty-four".