218181093 has 8 divisors (see below), whose sum is σ = 313285728. Its totient is φ = 134265264.

The previous prime is 218181053. The next prime is 218181101. The reversal of 218181093 is 390181812.

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

It is not a de Polignac number, because 218181093 - 2¹⁰ = 218180069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218181023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2797155 + ... + 2797232.

It is an arithmetic number, because the mean of its divisors is an integer number (39160716).

Almost surely, 2^218181093 is an apocalyptic number.

It is an amenable number.

218181093 is a deficient number, since it is larger than the sum of its proper divisors (95104635).

218181093 is a wasteful number, since it uses less digits than its factorization.

218181093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594403.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 218181093 is about 14770.9543699789. The cubic root of 218181093 is about 602.0127709273.

The spelling of 218181093 in words is "two hundred eighteen million, one hundred eighty-one thousand, ninety-three".