218396049 has 8 divisors (see below), whose sum is σ = 292414080. Its totient is φ = 144987696.

The previous prime is 218396033. The next prime is 218396069. The reversal of 218396049 is 940693812.

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

It is not a de Polignac number, because 218396049 - 2⁴ = 218396033 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 218396049.

It is not an unprimeable number, because it can be changed into a prime (218396069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151582 + ... + 153015.

It is an arithmetic number, because the mean of its divisors is an integer number (36551760).

Almost surely, 2^218396049 is an apocalyptic number.

It is an amenable number.

218396049 is a deficient number, since it is larger than the sum of its proper divisors (74018031).

218396049 is a wasteful number, since it uses less digits than its factorization.

218396049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304839.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 218396049 is about 14778.2288857630. The cubic root of 218396049 is about 602.2104106966.

The spelling of 218396049 in words is "two hundred eighteen million, three hundred ninety-six thousand, forty-nine".