33225021 has 12 divisors (see below), whose sum is σ = 50814972. Its totient is φ = 20846976.

The previous prime is 33225013. The next prime is 33225037. The reversal of 33225021 is 12052233.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 1988100 = 5589^2 + 1410^2 .

It is not a de Polignac number, because 33225021 - 2³ = 33225013 is a prime.

It is a super-2 number, since 2×33225021² = 2207804040900882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33224985 and 33225003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33225221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108426 + ... + 108731.

It is an arithmetic number, because the mean of its divisors is an integer number (4234581).

Almost surely, 2^33225021 is an apocalyptic number.

It is an amenable number.

33225021 is a deficient number, since it is larger than the sum of its proper divisors (17589951).

33225021 is a wasteful number, since it uses less digits than its factorization.

33225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217180 (or 217177 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 33225021 is about 5764.1149363974. The cubic root of 33225021 is about 321.4808352687.

Adding to 33225021 its reverse (12052233), we get a palindrome (45277254).

The spelling of 33225021 in words is "thirty-three million, two hundred twenty-five thousand, twenty-one".