218564545 has 8 divisors (see below), whose sum is σ = 262437120. Its totient is φ = 174745200.

The previous prime is 218564531. The next prime is 218564551. The reversal of 218564545 is 545465812.

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

It is not a de Polignac number, because 218564545 - 2⁷ = 218564417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218564498 and 218564507.

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, 3631 + ... + 21220.

It is an arithmetic number, because the mean of its divisors is an integer number (32804640).

Almost surely, 2^218564545 is an apocalyptic number.

It is an amenable number.

218564545 is a deficient number, since it is larger than the sum of its proper divisors (43872575).

218564545 is a wasteful number, since it uses less digits than its factorization.

218564545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26615.

The product of its digits is 192000, while the sum is 40.

The square root of 218564545 is about 14783.9286050765. The cubic root of 218564545 is about 602.3652424983.

The spelling of 218564545 in words is "two hundred eighteen million, five hundred sixty-four thousand, five hundred forty-five".