218404345 has 8 divisors (see below), whose sum is σ = 262174464. Its totient is φ = 174663984.

The previous prime is 218404337. The next prime is 218404357. The reversal of 218404345 is 543404812.

218404345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 218404345 - 2³ = 218404337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14712 + ... + 25558.

It is an arithmetic number, because the mean of its divisors is an integer number (32771808).

Almost surely, 2^218404345 is an apocalyptic number.

It is an amenable number.

218404345 is a deficient number, since it is larger than the sum of its proper divisors (43770119).

218404345 is a wasteful number, since it uses less digits than its factorization.

218404345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 218404345 is about 14778.5095662587. The cubic root of 218404345 is about 602.2180357953.

The spelling of 218404345 in words is "two hundred eighteen million, four hundred four thousand, three hundred forty-five".