218601145 has 16 divisors (see below), whose sum is σ = 300199680. Its totient is φ = 149696064.

The previous prime is 218601139. The next prime is 218601169. The reversal of 218601145 is 541106812.

It is not a de Polignac number, because 218601145 - 2¹⁷ = 218470073 is a prime.

It is a super-2 number, since 2×218601145² = 95572921190622050, which contains 22 as substring.

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, 25011 + ... + 32599.

It is an arithmetic number, because the mean of its divisors is an integer number (18762480).

Almost surely, 2^218601145 is an apocalyptic number.

It is an amenable number.

218601145 is a deficient number, since it is larger than the sum of its proper divisors (81598535).

218601145 is an equidigital number, since it uses as much as digits as its factorization.

218601145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8424.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 218601145 is about 14785.1663839133. The cubic root of 218601145 is about 602.3988638974.

Adding to 218601145 its reverse (541106812), we get a palindrome (759707957).

It can be divided in two parts, 21860 and 1145, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 218601145 in words is "two hundred eighteen million, six hundred one thousand, one hundred forty-five".