33313220 has 24 divisors (see below), whose sum is σ = 72215808. Its totient is φ = 12895200.

The previous prime is 33313219. The next prime is 33313237. The reversal of 33313220 is 2231333.

It is a super-2 number, since 2×33313220² = 2219541253536800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26246 + ... + 27485.

It is an arithmetic number, because the mean of its divisors is an integer number (3008992).

Almost surely, 2^33313220 is an apocalyptic number.

It is an amenable number.

33313220 is an abundant number, since it is smaller than the sum of its proper divisors (38902588).

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

33313220 is a wasteful number, since it uses less digits than its factorization.

33313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53771 (or 53769 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 33313220 is about 5771.7605632944. The cubic root of 33313220 is about 321.7650511453.

Subtracting from 33313220 its sum of digits (17), we obtain a triangular number (33313203 = T₈₁₆₂).

Adding to 33313220 its reverse (2231333), we get a palindrome (35544553).

It can be divided in two parts, 33313 and 220, that added together give a palindrome (33533).

The spelling of 33313220 in words is "thirty-three million, three hundred thirteen thousand, two hundred twenty".