211128450 has 48 divisors (see below), whose sum is σ = 563880576. Its totient is φ = 51969600.

The previous prime is 211128433. The next prime is 211128451. The reversal of 211128450 is 54821112.

211128450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211128450.

It is not an unprimeable number, because it can be changed into a prime (211128451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52186 + ... + 56085.

It is an arithmetic number, because the mean of its divisors is an integer number (11747512).

Almost surely, 2^211128450 is an apocalyptic number.

211128450 is an abundant number, since it is smaller than the sum of its proper divisors (352752126).

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

211128450 is a wasteful number, since it uses less digits than its factorization.

211128450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108299 (or 108294 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 211128450 is about 14530.2598049725. The cubic root of 211128450 is about 595.4549635623.

Adding to 211128450 its reverse (54821112), we get a palindrome (265949562).

The spelling of 211128450 in words is "two hundred eleven million, one hundred twenty-eight thousand, four hundred fifty".