211012550 has 48 divisors (see below), whose sum is σ = 450134880. Its totient is φ = 72092160.

The previous prime is 211012541. The next prime is 211012579. The reversal of 211012550 is 55210112.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117056 + ... + 118844.

It is an arithmetic number, because the mean of its divisors is an integer number (9377810).

Almost surely, 2^211012550 is an apocalyptic number.

211012550 is an abundant number, since it is smaller than the sum of its proper divisors (239122330).

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

211012550 is a wasteful number, since it uses less digits than its factorization.

211012550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 211012550 is about 14526.2710287259. The cubic root of 211012550 is about 595.3459843089.

Adding to 211012550 its reverse (55210112), we get a palindrome (266222662).

The spelling of 211012550 in words is "two hundred eleven million, twelve thousand, five hundred fifty".