213021232 has 10 divisors (see below), whose sum is σ = 412728668. Its totient is φ = 106510608.

The previous prime is 213021223. The next prime is 213021251. The reversal of 213021232 is 232120312.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 13313827 = 213021232 / (2 + 1 + 3 + 0 + 2 + 1 + 2 + 3 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656898 + ... + 6656929.

Almost surely, 2^213021232 is an apocalyptic number.

It is an amenable number.

213021232 is a deficient number, since it is larger than the sum of its proper divisors (199707436).

213021232 is a wasteful number, since it uses less digits than its factorization.

213021232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313835 (or 13313829 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213021232 is about 14595.2468975348. The cubic root of 213021232 is about 597.2291047460.

Adding to 213021232 its reverse (232120312), we get a palindrome (445141544).

The spelling of 213021232 in words is "two hundred thirteen million, twenty-one thousand, two hundred thirty-two".