33225720 has 64 divisors (see below), whose sum is σ = 108743040. Its totient is φ = 8054400.

The previous prime is 33225719. The next prime is 33225727. The reversal of 33225720 is 2752233.

It is a super-2 number, since 2×33225720² = 2207896939036800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33225727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11266 + ... + 13905.

It is an arithmetic number, because the mean of its divisors is an integer number (1699110).

Almost surely, 2^33225720 is an apocalyptic number.

33225720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33225720 is an abundant number, since it is smaller than the sum of its proper divisors (75517320).

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

33225720 is a wasteful number, since it uses less digits than its factorization.

33225720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25196 (or 25192 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 33225720 is about 5764.1755698452. The cubic root of 33225720 is about 321.4830897296.

Adding to 33225720 its reverse (2752233), we get a palindrome (35977953).

The spelling of 33225720 in words is "thirty-three million, two hundred twenty-five thousand, seven hundred twenty".