33332220 has 72 divisors (see below), whose sum is σ = 101621520. Its totient is φ = 8843520.

The previous prime is 33332197. The next prime is 33332231. The reversal of 33332220 is 2223333.

It is a super-2 number, since 2×33332220² = 2222073780256800, which contains 22 as substring.

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

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 33332193 and 33332202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50251 + ... + 50909.

It is an arithmetic number, because the mean of its divisors is an integer number (1411410).

Almost surely, 2^33332220 is an apocalyptic number.

33332220 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 33332220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50810760).

33332220 is an abundant number, since it is smaller than the sum of its proper divisors (68289300).

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

33332220 is a wasteful number, since it uses less digits than its factorization.

33332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 950 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 18.

The square root of 33332220 is about 5773.4062735962. The cubic root of 33332220 is about 321.8262117903.

Adding to 33332220 its reverse (2223333), we get a palindrome (35555553).

The spelling of 33332220 in words is "thirty-three million, three hundred thirty-two thousand, two hundred twenty".