218428033 has 8 divisors (see below), whose sum is σ = 233485056. Its totient is φ = 203834400.

The previous prime is 218428031. The next prime is 218428061. The reversal of 218428033 is 330824812.

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

It is a cyclic number.

It is not a de Polignac number, because 218428033 - 2¹ = 218428031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218427986 and 218428004.

It is not an unprimeable number, because it can be changed into a prime (218428031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114873 + ... + 116758.

It is an arithmetic number, because the mean of its divisors is an integer number (29185632).

Almost surely, 2^218428033 is an apocalyptic number.

218428033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

218428033 is a deficient number, since it is larger than the sum of its proper divisors (15057023).

218428033 is a wasteful number, since it uses less digits than its factorization.

218428033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231695.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 218428033 is about 14779.3109785267. The cubic root of 218428033 is about 602.2398070733.

The spelling of 218428033 in words is "two hundred eighteen million, four hundred twenty-eight thousand, thirty-three".