218081153 has 2 divisors, whose sum is σ = 218081154. Its totient is φ = 218081152.

The previous prime is 218081137. The next prime is 218081177. The reversal of 218081153 is 351180812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150381169 + 67699984 = 12263^2 + 8228^2 .

It is a cyclic number.

It is not a de Polignac number, because 218081153 - 2⁴ = 218081137 is a prime.

It is not a weakly prime, because it can be changed into another prime (218081113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109040576 + 109040577.

It is an arithmetic number, because the mean of its divisors is an integer number (109040577).

Almost surely, 2^218081153 is an apocalyptic number.

It is an amenable number.

218081153 is a deficient number, since it is larger than the sum of its proper divisors (1).

218081153 is an equidigital number, since it uses as much as digits as its factorization.

218081153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 218081153 is about 14767.5709918727. The cubic root of 218081153 is about 601.9208375946.

The spelling of 218081153 in words is "two hundred eighteen million, eighty-one thousand, one hundred fifty-three".