33625221 has 24 divisors (see below), whose sum is σ = 53051040. Its totient is φ = 18883872.

The previous prime is 33625217. The next prime is 33625243. The reversal of 33625221 is 12252633.

It is not a de Polignac number, because 33625221 - 2² = 33625217 is a prime.

It is a super-2 number, since 2×33625221² = 2261310974597682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33625191 and 33625200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33625261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6735 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (2210460).

Almost surely, 2^33625221 is an apocalyptic number.

It is an amenable number.

33625221 is a deficient number, since it is larger than the sum of its proper divisors (19425819).

33625221 is a wasteful number, since it uses less digits than its factorization.

33625221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3946 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 33625221 is about 5798.7258083134. The cubic root of 33625221 is about 322.7664476703.

Adding to 33625221 its reverse (12252633), we get a palindrome (45877854).

The spelling of 33625221 in words is "thirty-three million, six hundred twenty-five thousand, two hundred twenty-one".