211090239 has 16 divisors (see below), whose sum is σ = 314137600. Its totient is φ = 140091768.

The previous prime is 211090223. The next prime is 211090273. The reversal of 211090239 is 932090112.

It is not a de Polignac number, because 211090239 - 2⁴ = 211090223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211090219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11509 + ... + 23550.

It is an arithmetic number, because the mean of its divisors is an integer number (19633600).

Almost surely, 2^211090239 is an apocalyptic number.

211090239 is a deficient number, since it is larger than the sum of its proper divisors (103047361).

211090239 is a wasteful number, since it uses less digits than its factorization.

211090239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35291 (or 35285 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 211090239 is about 14528.9448687783. The cubic root of 211090239 is about 595.4190386669.

The spelling of 211090239 in words is "two hundred eleven million, ninety thousand, two hundred thirty-nine".