213111232 has 28 divisors (see below), whose sum is σ = 424784520. Its totient is φ = 106078976.

The previous prime is 213111229. The next prime is 213111259. The reversal of 213111232 is 232111312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7194 + ... + 21862.

Almost surely, 2^213111232 is an apocalyptic number.

It is an amenable number.

213111232 is a deficient number, since it is larger than the sum of its proper divisors (211673288).

213111232 is a wasteful number, since it uses less digits than its factorization.

213111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908 (or 14898 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 213111232 is about 14598.3297674768. The cubic root of 213111232 is about 597.3132012950.

Adding to 213111232 its reverse (232111312), we get a palindrome (445222544).

The spelling of 213111232 in words is "two hundred thirteen million, one hundred eleven thousand, two hundred thirty-two".