218942 has 4 divisors (see below), whose sum is σ = 328416. Its totient is φ = 109470.

The previous prime is 218941. The next prime is 218947. The reversal of 218942 is 249812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54734 + ... + 54737.

It is an arithmetic number, because the mean of its divisors is an integer number (82104).

2²¹⁸⁹⁴² is an apocalyptic number.

218942 is a deficient number, since it is larger than the sum of its proper divisors (109474).

218942 is a wasteful number, since it uses less digits than its factorization.

218942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109473.

The product of its digits is 1152, while the sum is 26.

The square root of 218942 is about 467.9123849611. The cubic root of 218942 is about 60.2711799184.

The spelling of 218942 in words is "two hundred eighteen thousand, nine hundred forty-two".