33440225 has 24 divisors (see below), whose sum is σ = 51038400. Its totient is φ = 21165120.

The previous prime is 33440221. The next prime is 33440233. The reversal of 33440225 is 52204433.

33440225 = 205² + 206² + ... + 477².

It is not a de Polignac number, because 33440225 - 2² = 33440221 is a prime.

It is a super-2 number, since 2×33440225² = 2236497296101250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33440225.

It is not an unprimeable number, because it can be changed into a prime (33440221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5075 + ... + 9624.

It is an arithmetic number, because the mean of its divisors is an integer number (2126600).

Almost surely, 2^33440225 is an apocalyptic number.

33440225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

33440225 is a deficient number, since it is larger than the sum of its proper divisors (17598175).

33440225 is a wasteful number, since it uses less digits than its factorization.

33440225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14729 (or 14724 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 33440225 is about 5782.7523723570. The cubic root of 33440225 is about 322.1734370366.

Adding to 33440225 its reverse (52204433), we get a palindrome (85644658).

The spelling of 33440225 in words is "thirty-three million, four hundred forty thousand, two hundred twenty-five".