218081046 has 8 divisors (see below), whose sum is σ = 436162104. Its totient is φ = 72693680.

The previous prime is 218081041. The next prime is 218081053. The reversal of 218081046 is 640180812.

It is a sphenic number, since it is the product of 3 distinct primes.

218081046 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218081041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18173415 + ... + 18173426.

It is an arithmetic number, because the mean of its divisors is an integer number (54520263).

Almost surely, 2^218081046 is an apocalyptic number.

218081046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218081046 is a wasteful number, since it uses less digits than its factorization.

218081046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36346846.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 218081046 is about 14767.5673690693. The cubic root of 218081046 is about 601.9207391518.

The spelling of 218081046 in words is "two hundred eighteen million, eighty-one thousand, forty-six".