218054140 has 12 divisors (see below), whose sum is σ = 457913736. Its totient is φ = 87221648.

The previous prime is 218054131. The next prime is 218054159. The reversal of 218054140 is 41450812.

It is a super-2 number, since 2×218054140² = 95095215942279200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5451334 + ... + 5451373.

It is an arithmetic number, because the mean of its divisors is an integer number (38159478).

Almost surely, 2^218054140 is an apocalyptic number.

218054140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218054140 is an abundant number, since it is smaller than the sum of its proper divisors (239859596).

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

218054140 is a wasteful number, since it uses less digits than its factorization.

218054140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10902716 (or 10902714 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 218054140 is about 14766.6563581604. The cubic root of 218054140 is about 601.8959839124.

The spelling of 218054140 in words is "two hundred eighteen million, fifty-four thousand, one hundred forty".