218104245 has 20 divisors (see below), whose sum is σ = 390972780. Its totient is φ = 116322048.

The previous prime is 218104223. The next prime is 218104247. The reversal of 218104245 is 542401812.

It can be written as a sum of positive squares in 2 ways, for example, as 148498596 + 69605649 = 12186^2 + 8343^2 .

It is not a de Polignac number, because 218104245 - 2⁶ = 218104181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218104247) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 268860 + ... + 269669.

It is an arithmetic number, because the mean of its divisors is an integer number (19548639).

Almost surely, 2^218104245 is an apocalyptic number.

It is an amenable number.

218104245 is a deficient number, since it is larger than the sum of its proper divisors (172868535).

218104245 is an equidigital number, since it uses as much as digits as its factorization.

218104245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538546 (or 538537 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 218104245 is about 14768.3528194582. The cubic root of 218104245 is about 601.9420820797.

The spelling of 218104245 in words is "two hundred eighteen million, one hundred four thousand, two hundred forty-five".