213440266 has 8 divisors (see below), whose sum is σ = 344788164. Its totient is φ = 98510880.

The previous prime is 213440263. The next prime is 213440267. The reversal of 213440266 is 662044312.

213440266 is digitally balanced in base 2 and base 3, because in such bases 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 + 893025 = 14579^2 + 945^2 .

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 (213440263) 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, 4104595 + ... + 4104646.

Almost surely, 2^213440266 is an apocalyptic number.

213440266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213440266 is a deficient number, since it is larger than the sum of its proper divisors (131347898).

213440266 is a wasteful number, since it uses less digits than its factorization.

213440266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8209256.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 213440266 is about 14609.5949978088. The cubic root of 213440266 is about 597.6204513149.

Adding to 213440266 its reverse (662044312), we get a palindrome (875484578).

The spelling of 213440266 in words is "two hundred thirteen million, four hundred forty thousand, two hundred sixty-six".