33215225 has 12 divisors (see below), whose sum is σ = 41614524. Its totient is φ = 26296320.

The previous prime is 33215191. The next prime is 33215227. The reversal of 33215225 is 52251233.

It can be written as a sum of positive squares in 6 ways, for example, as 7123561 + 26091664 = 2669^2 + 5108^2 .

It is a de Polignac number, because none of the positive numbers 2^k-33215225 is a prime.

It is a super-2 number, since 2×33215225² = 2206502343601250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33215225.

It is not an unprimeable number, because it can be changed into a prime (33215227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4424 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (3467877).

Almost surely, 2^33215225 is an apocalyptic number.

It is an amenable number.

33215225 is a deficient number, since it is larger than the sum of its proper divisors (8399299).

33215225 is a wasteful number, since it uses less digits than its factorization.

33215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13804 (or 13799 counting only the distinct ones).

The product of its digits is 1800, while the sum is 23.

The square root of 33215225 is about 5763.2651335853. The cubic root of 33215225 is about 321.4492372368.

Adding to 33215225 its reverse (52251233), we get a palindrome (85466458).

The spelling of 33215225 in words is "thirty-three million, two hundred fifteen thousand, two hundred twenty-five".