218941000 has 32 divisors (see below), whose sum is σ = 512324280. Its totient is φ = 87576000.

The previous prime is 218940991. The next prime is 218941007. The reversal of 218941000 is 149812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11062276 + 207878724 = 3326^2 + 14418^2 .

It is a super-2 number, since 2×218941000² = 95870322962000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (218941007) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 108471 + ... + 110470.

Almost surely, 2^218941000 is an apocalyptic number.

218941000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218941000 is an abundant number, since it is smaller than the sum of its proper divisors (293383280).

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

218941000 is a wasteful number, since it uses less digits than its factorization.

218941000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218962 (or 218948 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 218941000 is about 14796.6550274040. The cubic root of 218941000 is about 602.7108815704.

The spelling of 218941000 in words is "two hundred eighteen million, nine hundred forty-one thousand".