218462881 has 16 divisors (see below), whose sum is σ = 269296384. Its totient is φ = 172580544.

The previous prime is 218462819. The next prime is 218462891. The reversal of 218462881 is 188264812.

It is a cyclic number.

It is not a de Polignac number, because 218462881 - 2⁷ = 218462753 is a prime.

It is a super-2 number, since 2×218462881² = 95452060749640322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (218462891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73435 + ... + 76351.

It is an arithmetic number, because the mean of its divisors is an integer number (16831024).

Almost surely, 2^218462881 is an apocalyptic number.

It is an amenable number.

218462881 is a deficient number, since it is larger than the sum of its proper divisors (50833503).

218462881 is a wasteful number, since it uses less digits than its factorization.

218462881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760.

The product of its digits is 49152, while the sum is 40.

The square root of 218462881 is about 14780.4898768613. The cubic root of 218462881 is about 602.2718324755.

The spelling of 218462881 in words is "two hundred eighteen million, four hundred sixty-two thousand, eight hundred eighty-one".