218012849 has 4 divisors (see below), whose sum is σ = 218110464. Its totient is φ = 217915236.

The previous prime is 218012831. The next prime is 218012857. The reversal of 218012849 is 948210812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 218012849 - 2¹⁶ = 217947313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218012449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45377 + ... + 49950.

It is an arithmetic number, because the mean of its divisors is an integer number (54527616).

Almost surely, 2^218012849 is an apocalyptic number.

It is an amenable number.

218012849 is a deficient number, since it is larger than the sum of its proper divisors (97615).

218012849 is an equidigital number, since it uses as much as digits as its factorization.

218012849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97614.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 218012849 is about 14765.2581758668. The cubic root of 218012849 is about 601.8579895930.

The spelling of 218012849 in words is "two hundred eighteen million, twelve thousand, eight hundred forty-nine".