213020266 has 4 divisors (see below), whose sum is σ = 319530402. Its totient is φ = 106510132.

The previous prime is 213020257. The next prime is 213020317. The reversal of 213020266 is 662020312.

It is a happy number.

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., 213014025 + 6241 = 14595^2 + 79^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53255065 + ... + 53255068.

Almost surely, 2^213020266 is an apocalyptic number.

213020266 is a deficient number, since it is larger than the sum of its proper divisors (106510136).

213020266 is a wasteful number, since it uses less digits than its factorization.

213020266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106510135.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 213020266 is about 14595.2138045320. The cubic root of 213020266 is about 597.2282019812.

Adding to 213020266 its reverse (662020312), we get a palindrome (875040578).

The spelling of 213020266 in words is "two hundred thirteen million, twenty thousand, two hundred sixty-six".