33061220 has 12 divisors (see below), whose sum is σ = 69428604. Its totient is φ = 13224480.

The previous prime is 33061213. The next prime is 33061229. The reversal of 33061220 is 2216033.

It can be written as a sum of positive squares in 2 ways, for example, as 24049216 + 9012004 = 4904^2 + 3002^2 .

It is not an unprimeable number, because it can be changed into a prime (33061229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826511 + ... + 826550.

It is an arithmetic number, because the mean of its divisors is an integer number (5785717).

Almost surely, 2^33061220 is an apocalyptic number.

It is an amenable number.

33061220 is an abundant number, since it is smaller than the sum of its proper divisors (36367384).

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

33061220 is a wasteful number, since it uses less digits than its factorization.

33061220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653070 (or 1653068 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33061220 is about 5749.8886945749. Note that the first 3 decimals coincide. The cubic root of 33061220 is about 320.9516592093.

Adding to 33061220 its reverse (2216033), we get a palindrome (35277253).

The spelling of 33061220 in words is "thirty-three million, sixty-one thousand, two hundred twenty".