218350081 has 8 divisors (see below), whose sum is σ = 228483584. Its totient is φ = 208409760.

The previous prime is 218350079. The next prime is 218350103. The reversal of 218350081 is 180053812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218350081 - 2¹ = 218350079 is a prime.

It is a super-2 number, since 2×218350081² = 95353515745413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218356081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45981 + ... + 50506.

It is an arithmetic number, because the mean of its divisors is an integer number (28560448).

Almost surely, 2^218350081 is an apocalyptic number.

It is an amenable number.

218350081 is a deficient number, since it is larger than the sum of its proper divisors (10133503).

218350081 is an equidigital number, since it uses as much as digits as its factorization.

218350081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96591.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 218350081 is about 14776.6735431219. The cubic root of 218350081 is about 602.1681566499.

The spelling of 218350081 in words is "two hundred eighteen million, three hundred fifty thousand, eighty-one".