213091606 has 16 divisors (see below), whose sum is σ = 393400224. Its totient is φ = 84299904.

The previous prime is 213091591. The next prime is 213091609. The reversal of 213091606 is 606190312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213091609) by changing a digit.

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, 585235 + ... + 585598.

It is an arithmetic number, because the mean of its divisors is an integer number (24587514).

Almost surely, 2^213091606 is an apocalyptic number.

213091606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

213091606 is a deficient number, since it is larger than the sum of its proper divisors (180308618).

213091606 is a wasteful number, since it uses less digits than its factorization.

213091606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170855.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 213091606 is about 14597.6575518129. The cubic root of 213091606 is about 597.2948646598.

The spelling of 213091606 in words is "two hundred thirteen million, ninety-one thousand, six hundred six".