218961080 has 32 divisors (see below), whose sum is σ = 530560800. Its totient is φ = 80846976.

The previous prime is 218961059. The next prime is 218961103. The reversal of 218961080 is 80169812.

It is a self number, because there is not a number n which added to its sum of digits gives 218961080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210020 + ... + 211059.

It is an arithmetic number, because the mean of its divisors is an integer number (16580025).

Almost surely, 2^218961080 is an apocalyptic number.

218961080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218961080 is an abundant number, since it is smaller than the sum of its proper divisors (311599720).

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

218961080 is a wasteful number, since it uses less digits than its factorization.

218961080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421103 (or 421099 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 218961080 is about 14797.3335435814. Note that the first 3 decimals coincide. The cubic root of 218961080 is about 602.7293067238.

The spelling of 218961080 in words is "two hundred eighteen million, nine hundred sixty-one thousand, eighty".