218220150 has 24 divisors (see below), whose sum is σ = 541186344. Its totient is φ = 58192000.

The previous prime is 218220137. The next prime is 218220161. The reversal of 218220150 is 51022812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727251 + ... + 727550.

It is an arithmetic number, because the mean of its divisors is an integer number (22549431).

Almost surely, 2^218220150 is an apocalyptic number.

218220150 is an abundant number, since it is smaller than the sum of its proper divisors (322966194).

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

218220150 is a wasteful number, since it uses less digits than its factorization.

218220150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454816 (or 1454811 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 218220150 is about 14772.2763987139. The cubic root of 218220150 is about 602.0486912563.

Adding to 218220150 its reverse (51022812), we get a palindrome (269242962).

The spelling of 218220150 in words is "two hundred eighteen million, two hundred twenty thousand, one hundred fifty".