211205255 has 8 divisors (see below), whose sum is σ = 254273712. Its totient is φ = 168412608.

The previous prime is 211205233. The next prime is 211205257. The reversal of 211205255 is 552502112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211205255 - 2¹⁴ = 211188871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211205255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211205257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67262 + ... + 70331.

It is an arithmetic number, because the mean of its divisors is an integer number (31784214).

Almost surely, 2^211205255 is an apocalyptic number.

211205255 is a deficient number, since it is larger than the sum of its proper divisors (43068457).

211205255 is a wasteful number, since it uses less digits than its factorization.

211205255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137905.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 211205255 is about 14532.9024974366. The cubic root of 211205255 is about 595.5271603282.

Adding to 211205255 its reverse (552502112), we get a palindrome (763707367).

The spelling of 211205255 in words is "two hundred eleven million, two hundred five thousand, two hundred fifty-five".