213881266 has 8 divisors (see below), whose sum is σ = 321247980. Its totient is φ = 106798608.

The previous prime is 213881263. The next prime is 213881279. The reversal of 213881266 is 662188312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 212547241 + 1334025 = 14579^2 + 1155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213881263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69121 + ... + 72148.

Almost surely, 2^213881266 is an apocalyptic number.

213881266 is a deficient number, since it is larger than the sum of its proper divisors (107366714).

213881266 is a wasteful number, since it uses less digits than its factorization.

213881266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142028.

The product of its digits is 27648, while the sum is 37.

The square root of 213881266 is about 14624.6800306879. The cubic root of 213881266 is about 598.0317597029.

The spelling of 213881266 in words is "two hundred thirteen million, eight hundred eighty-one thousand, two hundred sixty-six".