33421225 has 12 divisors (see below), whose sum is σ = 42012316. Its totient is φ = 26369280.

The previous prime is 33421189. The next prime is 33421237. The reversal of 33421225 is 52212433.

It can be written as a sum of positive squares in 6 ways, for example, as 1915456 + 31505769 = 1384^2 + 5613^2 .

It is not a de Polignac number, because 33421225 - 2⁷ = 33421097 is a prime.

It is a super-2 number, since 2×33421225² = 2233956561001250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33421196 and 33421205.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7332 + ... + 10981.

Almost surely, 2^33421225 is an apocalyptic number.

It is an amenable number.

33421225 is a deficient number, since it is larger than the sum of its proper divisors (8591091).

33421225 is a wasteful number, since it uses less digits than its factorization.

33421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18396 (or 18391 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 33421225 is about 5781.1093226127. The cubic root of 33421225 is about 322.1124081909.

Adding to 33421225 its reverse (52212433), we get a palindrome (85633658).

The spelling of 33421225 in words is "thirty-three million, four hundred twenty-one thousand, two hundred twenty-five".