216233320 has 32 divisors (see below), whose sum is σ = 488634120. Its totient is φ = 86118400.

The previous prime is 216233317. The next prime is 216233333. The reversal of 216233320 is 23332612.

It can be written as a sum of positive squares in 4 ways, for example, as 189172516 + 27060804 = 13754^2 + 5202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216233291 and 216233300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2281 + ... + 20920.

Almost surely, 2^216233320 is an apocalyptic number.

216233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216233320 is an abundant number, since it is smaller than the sum of its proper divisors (272400800).

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

216233320 is a wasteful number, since it uses less digits than its factorization.

216233320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23445 (or 23441 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 216233320 is about 14704.8740219017. The cubic root of 216233320 is about 600.2159592970.

Adding to 216233320 its reverse (23332612), we get a palindrome (239565932).

The spelling of 216233320 in words is "two hundred sixteen million, two hundred thirty-three thousand, three hundred twenty".