218300705 has 16 divisors (see below), whose sum is σ = 312401664. Its totient is φ = 143183040.

The previous prime is 218300699. The next prime is 218300717. The reversal of 218300705 is 507003812.

It is not a de Polignac number, because 218300705 - 2¹⁴ = 218284321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134786 + ... + 136395.

It is an arithmetic number, because the mean of its divisors is an integer number (19525104).

Almost surely, 2^218300705 is an apocalyptic number.

It is an amenable number.

218300705 is a deficient number, since it is larger than the sum of its proper divisors (94100959).

218300705 is a wasteful number, since it uses less digits than its factorization.

218300705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271216.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 218300705 is about 14775.0027072756. The cubic root of 218300705 is about 602.1227633435.

The spelling of 218300705 in words is "two hundred eighteen million, three hundred thousand, seven hundred five".