218105244 has 48 divisors (see below), whose sum is σ = 646240000. Its totient is φ = 62315568.

The previous prime is 218105227. The next prime is 218105249. The reversal of 218105244 is 442501812.

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 (218105249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143494 + ... + 145005.

Almost surely, 2^218105244 is an apocalyptic number.

It is an amenable number.

218105244 is an abundant number, since it is smaller than the sum of its proper divisors (428134756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218105244 is a wasteful number, since it uses less digits than its factorization.

218105244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288519 (or 288511 counting only the distinct ones).

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

The square root of 218105244 is about 14768.3866417426. The cubic root of 218105244 is about 601.9430011191.

The spelling of 218105244 in words is "two hundred eighteen million, one hundred five thousand, two hundred forty-four".