33218142 has 8 divisors (see below), whose sum is σ = 66436296. Its totient is φ = 11072712.

The previous prime is 33218123. The next prime is 33218149. The reversal of 33218142 is 24181233.

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

33218142 is an admirable number.

It is a super-2 number, since 2×33218142² = 2206889915864328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33218149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768173 + ... + 2768184.

It is an arithmetic number, because the mean of its divisors is an integer number (8304537).

Almost surely, 2^33218142 is an apocalyptic number.

33218142 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.

33218142 is a wasteful number, since it uses less digits than its factorization.

33218142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536362.

The product of its digits is 1152, while the sum is 24.

The square root of 33218142 is about 5763.5181963797. The cubic root of 33218142 is about 321.4586469777.

Adding to 33218142 its reverse (24181233), we get a palindrome (57399375).

The spelling of 33218142 in words is "thirty-three million, two hundred eighteen thousand, one hundred forty-two".