218672049 has 8 divisors (see below), whose sum is σ = 295075872. Its totient is φ = 144024800.

The previous prime is 218672039. The next prime is 218672081. The reversal of 218672049 is 940276812.

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 218672049 - 2⁴ = 218672033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218671998 and 218672016.

It is not an unprimeable number, because it can be changed into a prime (218672039) 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, 438852 + ... + 439349.

It is an arithmetic number, because the mean of its divisors is an integer number (36884484).

Almost surely, 2^218672049 is an apocalyptic number.

It is an amenable number.

218672049 is a deficient number, since it is larger than the sum of its proper divisors (76403823).

218672049 is an equidigital number, since it uses as much as digits as its factorization.

218672049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878287.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 218672049 is about 14787.5639981709. The cubic root of 218672049 is about 602.4639868743.

The spelling of 218672049 in words is "two hundred eighteen million, six hundred seventy-two thousand, forty-nine".