213768205 has 16 divisors (see below), whose sum is σ = 294395904. Its totient is φ = 145969920.

The previous prime is 213768197. The next prime is 213768263. The reversal of 213768205 is 502867312.

It is a happy number.

It is not a de Polignac number, because 213768205 - 2³ = 213768197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4237 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (18399744).

Almost surely, 2^213768205 is an apocalyptic number.

It is an amenable number.

213768205 is a deficient number, since it is larger than the sum of its proper divisors (80627699).

213768205 is a wasteful number, since it uses less digits than its factorization.

213768205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25596.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 213768205 is about 14620.8141018207. The cubic root of 213768205 is about 597.9263647993.

The spelling of 213768205 in words is "two hundred thirteen million, seven hundred sixty-eight thousand, two hundred five".