218881484 has 6 divisors (see below), whose sum is σ = 383042604. Its totient is φ = 109440740.

The previous prime is 218881471. The next prime is 218881517. The reversal of 218881484 is 484188812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27360182 + ... + 27360189.

It is an arithmetic number, because the mean of its divisors is an integer number (63840434).

Almost surely, 2^218881484 is an apocalyptic number.

It is an amenable number.

218881484 is a deficient number, since it is larger than the sum of its proper divisors (164161120).

218881484 is a wasteful number, since it uses less digits than its factorization.

218881484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54720375 (or 54720373 counting only the distinct ones).

The product of its digits is 131072, while the sum is 44.

The square root of 218881484 is about 14794.6437604966. The cubic root of 218881484 is about 602.6562638246.

The spelling of 218881484 in words is "two hundred eighteen million, eight hundred eighty-one thousand, four hundred eighty-four".