218864145 has 8 divisors (see below), whose sum is σ = 350182656. Its totient is φ = 116727536.

The previous prime is 218864089. The next prime is 218864153. The reversal of 218864145 is 541468812.

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 218864145 - 2⁷ = 218864017 is a prime.

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, 7295457 + ... + 7295486.

It is an arithmetic number, because the mean of its divisors is an integer number (43772832).

Almost surely, 2^218864145 is an apocalyptic number.

It is an amenable number.

218864145 is a deficient number, since it is larger than the sum of its proper divisors (131318511).

218864145 is a wasteful number, since it uses less digits than its factorization.

218864145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14590951.

The product of its digits is 61440, while the sum is 39.

The square root of 218864145 is about 14794.0577597899. The cubic root of 218864145 is about 602.6403499874.

The spelling of 218864145 in words is "two hundred eighteen million, eight hundred sixty-four thousand, one hundred forty-five".