218196650 has 48 divisors (see below), whose sum is σ = 468678336. Its totient is φ = 74027520.

The previous prime is 218196637. The next prime is 218196673. The reversal of 218196650 is 56691812.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30737 + ... + 37163.

It is an arithmetic number, because the mean of its divisors is an integer number (9764132).

Almost surely, 2^218196650 is an apocalyptic number.

218196650 is an abundant number, since it is smaller than the sum of its proper divisors (250481686).

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

218196650 is a wasteful number, since it uses less digits than its factorization.

218196650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543 (or 6538 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 218196650 is about 14771.4809684067. The cubic root of 218196650 is about 602.0270790570.

The spelling of 218196650 in words is "two hundred eighteen million, one hundred ninety-six thousand, six hundred fifty".