33305312220 has 24 divisors (see below), whose sum is σ = 93254874384. Its totient is φ = 8881416576.

The previous prime is 33305312197. The next prime is 33305312233. The reversal of 33305312220 is 2221350333.

It is a super-2 number, since 2×33305312220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277544209 + ... + 277544328.

It is an arithmetic number, because the mean of its divisors is an integer number (3885619766).

Almost surely, 2^33305312220 is an apocalyptic number.

33305312220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33305312220 is an abundant number, since it is smaller than the sum of its proper divisors (59949562164).

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

33305312220 is a wasteful number, since it uses less digits than its factorization.

33305312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555088549 (or 555088547 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 33305312220 its reverse (2221350333), we get a palindrome (35526662553).

The spelling of 33305312220 in words is "thirty-three billion, three hundred five million, three hundred twelve thousand, two hundred twenty".