211156242 has 32 divisors (see below), whose sum is σ = 470513664. Its totient is φ = 62624400.

The previous prime is 211156241. The next prime is 211156259. The reversal of 211156242 is 242651112.

It is not an unprimeable number, because it can be changed into a prime (211156241) 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, 30934 + ... + 37137.

It is an arithmetic number, because the mean of its divisors is an integer number (14703552).

Almost surely, 2^211156242 is an apocalyptic number.

211156242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211156242 is an abundant number, since it is smaller than the sum of its proper divisors (259357422).

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

211156242 is a wasteful number, since it uses less digits than its factorization.

211156242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68134.

The product of its digits is 960, while the sum is 24.

The square root of 211156242 is about 14531.2161225412. The cubic root of 211156242 is about 595.4810900874.

The spelling of 211156242 in words is "two hundred eleven million, one hundred fifty-six thousand, two hundred forty-two".