218771480 has 16 divisors (see below), whose sum is σ = 492235920. Its totient is φ = 87508576.

The previous prime is 218771479. The next prime is 218771489. The reversal of 218771480 is 84177812.

It is a super-2 number, since 2×218771480² = 95721920922780800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218771489) 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, 2734604 + ... + 2734683.

It is an arithmetic number, because the mean of its divisors is an integer number (30764745).

Almost surely, 2^218771480 is an apocalyptic number.

218771480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218771480 is an abundant number, since it is smaller than the sum of its proper divisors (273464440).

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

218771480 is a wasteful number, since it uses less digits than its factorization.

218771480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469298 (or 5469294 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 218771480 is about 14790.9255964595. The cubic root of 218771480 is about 602.5552872482. Note that the first 3 decimals are identical.

The spelling of 218771480 in words is "two hundred eighteen million, seven hundred seventy-one thousand, four hundred eighty".