218163296 has 48 divisors (see below), whose sum is σ = 473866848. Its totient is φ = 98227200.

The previous prime is 218163293. The next prime is 218163307. The reversal of 218163296 is 692361812.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218163293) 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, 10661 + ... + 23451.

It is an arithmetic number, because the mean of its divisors is an integer number (9872226).

Almost surely, 2^218163296 is an apocalyptic number.

218163296 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

218163296 is the 8528-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218163296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236933424).

218163296 is an abundant number, since it is smaller than the sum of its proper divisors (255703552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218163296 is a wasteful number, since it uses less digits than its factorization.

218163296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12855 (or 12847 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 218163296 is about 14770.3519253943. The cubic root of 218163296 is about 601.9964017842.

The spelling of 218163296 in words is "two hundred eighteen million, one hundred sixty-three thousand, two hundred ninety-six".