213211466 has 8 divisors (see below), whose sum is σ = 344418564. Its totient is φ = 98405280.

The previous prime is 213211463. The next prime is 213211489. The reversal of 213211466 is 664112312.

213211466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212547241 + 664225 = 14579^2 + 815^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 8200441 = 213211466 / (2 + 1 + 3 + 2 + 1 + 1 + 4 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (213211463) 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, 4100195 + ... + 4100246.

Almost surely, 2^213211466 is an apocalyptic number.

213211466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213211466 is a deficient number, since it is larger than the sum of its proper divisors (131207098).

213211466 is a wasteful number, since it uses less digits than its factorization.

213211466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200456.

The product of its digits is 1728, while the sum is 26.

The square root of 213211466 is about 14601.7624278715. The cubic root of 213211466 is about 597.4068326924.

Adding to 213211466 its reverse (664112312), we get a palindrome (877323778).

The spelling of 213211466 in words is "two hundred thirteen million, two hundred eleven thousand, four hundred sixty-six".