303223220 has 48 divisors (see below), whose sum is σ = 676988928. Its totient is φ = 113687040.

The previous prime is 303223201. The next prime is 303223259. The reversal of 303223220 is 22322303.

It is a super-2 number, since 2×303223220² = 183888642294336800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87725 + ... + 91115.

It is an arithmetic number, because the mean of its divisors is an integer number (14103936).

Almost surely, 2^303223220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338494464).

303223220 is an abundant number, since it is smaller than the sum of its proper divisors (373765708).

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

303223220 is a wasteful number, since it uses less digits than its factorization.

303223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3678 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 303223220 is about 17413.3058320355. The cubic root of 303223220 is about 671.8218921642.

Adding to 303223220 its reverse (22322303), we get a palindrome (325545523).

The spelling of 303223220 in words is "three hundred three million, two hundred twenty-three thousand, two hundred twenty".