43398225 has 72 divisors (see below), whose sum is σ = 86187192. Its totient is φ = 20736000.

The previous prime is 43398221. The next prime is 43398227. The reversal of 43398225 is 52289334.

43398225 is a `hidden beast` number, since 43 + 398 + 225 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 1096209 + 42302016 = 1047^2 + 6504^2 .

It is not a de Polignac number, because 43398225 - 2² = 43398221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43398225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43398221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 108025 + ... + 108425.

Almost surely, 2^43398225 is an apocalyptic number.

43398225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43398225 is a deficient number, since it is larger than the sum of its proper divisors (42788967).

43398225 is a wasteful number, since it uses less digits than its factorization.

43398225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 459 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 43398225 is about 6587.7329180834. The cubic root of 43398225 is about 351.4179889026.

The spelling of 43398225 in words is "forty-three million, three hundred ninety-eight thousand, two hundred twenty-five".