33481220 has 24 divisors (see below), whose sum is σ = 70635264. Its totient is φ = 13330656.

The previous prime is 33481193. The next prime is 33481247. The reversal of 33481220 is 2218433.

It is an interprime number because it is at equal distance from previous prime (33481193) and next prime (33481247).

It is a super-2 number, since 2×33481220² = 2241984185376800, 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, 707 + ... + 8213.

It is an arithmetic number, because the mean of its divisors is an integer number (2943136).

Almost surely, 2^33481220 is an apocalyptic number.

It is an amenable number.

33481220 is an abundant number, since it is smaller than the sum of its proper divisors (37154044).

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

33481220 is a wasteful number, since it uses less digits than its factorization.

33481220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739 (or 7737 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 33481220 is about 5786.2958790577. The cubic root of 33481220 is about 322.3050360975.

Adding to 33481220 its reverse (2218433), we get a palindrome (35699653).

The spelling of 33481220 in words is "thirty-three million, four hundred eighty-one thousand, two hundred twenty".