213032666 has 32 divisors (see below), whose sum is σ = 412145280. Its totient is φ = 80136000.

The previous prime is 213032663. The next prime is 213032689. The reversal of 213032666 is 666230312.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (213032663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19385 + ... + 28316.

It is an arithmetic number, because the mean of its divisors is an integer number (12879540).

Almost surely, 2^213032666 is an apocalyptic number.

213032666 is a deficient number, since it is larger than the sum of its proper divisors (199112614).

213032666 is a wasteful number, since it uses less digits than its factorization.

213032666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47750.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 213032666 is about 14595.6385951420. The cubic root of 213032666 is about 597.2397900586.

Adding to 213032666 its reverse (666230312), we get a palindrome (879262978).

The spelling of 213032666 in words is "two hundred thirteen million, thirty-two thousand, six hundred sixty-six".