233321220 has 72 divisors (see below), whose sum is σ = 772087680. Its totient is φ = 56562240.

The previous prime is 233321171. The next prime is 233321227. The reversal of 233321220 is 22123332.

It is a happy number.

233321220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 233321193 and 233321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233321227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56940 + ... + 60899.

It is an arithmetic number, because the mean of its divisors is an integer number (10723440).

Almost surely, 2^233321220 is an apocalyptic number.

233321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233321220 is an abundant number, since it is smaller than the sum of its proper divisors (538766460).

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

233321220 is a wasteful number, since it uses less digits than its factorization.

233321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117865 (or 117860 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 233321220 is about 15274.8558094667. The cubic root of 233321220 is about 615.6275964916.

Adding to 233321220 its reverse (22123332), we get a palindrome (255444552).

The spelling of 233321220 in words is "two hundred thirty-three million, three hundred twenty-one thousand, two hundred twenty".