211725213 has 16 divisors (see below), whose sum is σ = 325095936. Its totient is φ = 120060720.

The previous prime is 211725209. The next prime is 211725221. The reversal of 211725213 is 312527112.

It is not a de Polignac number, because 211725213 - 2² = 211725209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211725203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35731 + ... + 41232.

It is an arithmetic number, because the mean of its divisors is an integer number (20318496).

Almost surely, 2^211725213 is an apocalyptic number.

It is an amenable number.

211725213 is a deficient number, since it is larger than the sum of its proper divisors (113370723).

211725213 is a wasteful number, since it uses less digits than its factorization.

211725213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77104.

The product of its digits is 840, while the sum is 24.

The square root of 211725213 is about 14550.7804945302. The cubic root of 211725213 is about 596.0154615526.

The spelling of 211725213 in words is "two hundred eleven million, seven hundred twenty-five thousand, two hundred thirteen".