211942 has 4 divisors (see below), whose sum is σ = 317916. Its totient is φ = 105970.

The previous prime is 211933. The next prime is 211943. The reversal of 211942 is 249112.

211942 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×211942² = 89838822728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52984 + ... + 52987.

It is an arithmetic number, because the mean of its divisors is an integer number (79479).

2²¹¹⁹⁴² is an apocalyptic number.

211942 is a deficient number, since it is larger than the sum of its proper divisors (105974).

211942 is a wasteful number, since it uses less digits than its factorization.

211942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105973.

The product of its digits is 144, while the sum is 19.

The square root of 211942 is about 460.3715890452. The cubic root of 211942 is about 59.6218813699.

The spelling of 211942 in words is "two hundred eleven thousand, nine hundred forty-two".