211139268 has 24 divisors (see below), whose sum is σ = 493479168. Its totient is φ = 70262496.

The previous prime is 211139263. The next prime is 211139309. The reversal of 211139268 is 862931112.

211139268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211139263) 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, 6996 + ... + 21707.

It is an arithmetic number, because the mean of its divisors is an integer number (20561632).

Almost surely, 2^211139268 is an apocalyptic number.

It is an amenable number.

211139268 is an abundant number, since it is smaller than the sum of its proper divisors (282339900).

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

211139268 is a wasteful number, since it uses less digits than its factorization.

211139268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29323 (or 29321 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 211139268 is about 14530.6320578287. The cubic root of 211139268 is about 595.4651335508.

It can be divided in two parts, 21113 and 9268, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 211139268 in words is "two hundred eleven million, one hundred thirty-nine thousand, two hundred sixty-eight".