213284866 has 4 divisors (see below), whose sum is σ = 319927302. Its totient is φ = 106642432.

The previous prime is 213284857. The next prime is 213284893. The reversal of 213284866 is 668482312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140541025 + 72743841 = 11855^2 + 8529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53321215 + ... + 53321218.

Almost surely, 2^213284866 is an apocalyptic number.

213284866 is a deficient number, since it is larger than the sum of its proper divisors (106642436).

213284866 is a wasteful number, since it uses less digits than its factorization.

213284866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106642435.

The product of its digits is 110592, while the sum is 40.

The square root of 213284866 is about 14604.2756068214. The cubic root of 213284866 is about 597.4753790850.

The spelling of 213284866 in words is "two hundred thirteen million, two hundred eighty-four thousand, eight hundred sixty-six".