33223020 has 96 divisors (see below), whose sum is σ = 99079680. Its totient is φ = 8294400.

The previous prime is 33223019. The next prime is 33223027. The reversal of 33223020 is 2032233.

It is a super-2 number, since 2×33223020² = 2207538115840800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (33223027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172044 + ... + 172236.

It is an arithmetic number, because the mean of its divisors is an integer number (1032080).

Almost surely, 2^33223020 is an apocalyptic number.

33223020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33223020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49539840).

33223020 is an abundant number, since it is smaller than the sum of its proper divisors (65856660).

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

33223020 is a wasteful number, since it uses less digits than its factorization.

33223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 33223020 is about 5763.9413598683. The cubic root of 33223020 is about 321.4743813368.

Adding to 33223020 its reverse (2032233), we get a palindrome (35255253).

The spelling of 33223020 in words is "thirty-three million, two hundred twenty-three thousand, twenty".