218151084 has 48 divisors (see below), whose sum is σ = 544924800. Its totient is φ = 67718016.

The previous prime is 218151077. The next prime is 218151091. The reversal of 218151084 is 480151812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (218151077) and next prime (218151091).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5344 + ... + 21560.

It is an arithmetic number, because the mean of its divisors is an integer number (11352600).

Almost surely, 2^218151084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218151084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272462400).

218151084 is an abundant number, since it is smaller than the sum of its proper divisors (326773716).

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

218151084 is a wasteful number, since it uses less digits than its factorization.

218151084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16302 (or 16300 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 218151084 is about 14769.9385239073. The cubic root of 218151084 is about 601.9851690404.

The spelling of 218151084 in words is "two hundred eighteen million, one hundred fifty-one thousand, eighty-four".