218861163 has 16 divisors (see below), whose sum is σ = 325395840. Its totient is φ = 145386792.

The previous prime is 218861141. The next prime is 218861177. The reversal of 218861163 is 361168812.

It is not a de Polignac number, because 218861163 - 2⁵ = 218861131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218861113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6681 + ... + 21962.

It is an arithmetic number, because the mean of its divisors is an integer number (20337240).

Almost surely, 2^218861163 is an apocalyptic number.

218861163 is a deficient number, since it is larger than the sum of its proper divisors (106534677).

218861163 is a wasteful number, since it uses less digits than its factorization.

218861163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28935 (or 28929 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 218861163 is about 14793.9569757384. The cubic root of 218861163 is about 602.6376130054.

It can be divided in two parts, 218861 and 163, that added together give a square (219024 = 468²).

The spelling of 218861163 in words is "two hundred eighteen million, eight hundred sixty-one thousand, one hundred sixty-three".