218354442 has 8 divisors (see below), whose sum is σ = 436708896. Its totient is φ = 72784812.

The previous prime is 218354431. The next prime is 218354453. The reversal of 218354442 is 244453812.

It is an interprime number because it is at equal distance from previous prime (218354431) and next prime (218354453).

It is a sphenic number, since it is the product of 3 distinct primes.

218354442 is an admirable number.

It is a super-2 number, since 2×218354442² = 95357324682262728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18196198 + ... + 18196209.

It is an arithmetic number, because the mean of its divisors is an integer number (54588612).

Almost surely, 2^218354442 is an apocalyptic number.

218354442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218354442 is a wasteful number, since it uses less digits than its factorization.

218354442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36392412.

The product of its digits is 30720, while the sum is 33.

The square root of 218354442 is about 14776.8211060431. The cubic root of 218354442 is about 602.1721655604.

The spelling of 218354442 in words is "two hundred eighteen million, three hundred fifty-four thousand, four hundred forty-two".