213406266 has 16 divisors (see below), whose sum is σ = 427161600. Its totient is φ = 71077248.

The previous prime is 213406199. The next prime is 213406279. The reversal of 213406266 is 662604312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6231 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (26697600).

Almost surely, 2^213406266 is an apocalyptic number.

213406266 is an abundant number, since it is smaller than the sum of its proper divisors (213755334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213406266 is a wasteful number, since it uses less digits than its factorization.

213406266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29093.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 213406266 is about 14608.4313326243. The cubic root of 213406266 is about 597.5887169492.

The spelling of 213406266 in words is "two hundred thirteen million, four hundred six thousand, two hundred sixty-six".