33431225 has 12 divisors (see below), whose sum is σ = 41860416. Its totient is φ = 26483280.

The previous prime is 33431221. The next prime is 33431227. The reversal of 33431225 is 52213433.

It is not a de Polignac number, because 33431225 - 2² = 33431221 is a prime.

It is a super-2 number, since 2×33431225² = 2235293610001250, 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 33431225.

It is not an unprimeable number, because it can be changed into a prime (33431221) 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, 3917 + ... + 9066.

It is an arithmetic number, because the mean of its divisors is an integer number (3488368).

Almost surely, 2^33431225 is an apocalyptic number.

It is an amenable number.

33431225 is a deficient number, since it is larger than the sum of its proper divisors (8429191).

33431225 is a wasteful number, since it uses less digits than its factorization.

33431225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096 (or 13091 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 33431225 is about 5781.9741438370. The cubic root of 33431225 is about 322.1445315184.

Adding to 33431225 its reverse (52213433), we get a palindrome (85644658).

The spelling of 33431225 in words is "thirty-three million, four hundred thirty-one thousand, two hundred twenty-five".