43225221 has 16 divisors (see below), whose sum is σ = 62185536. Its totient is φ = 26549376.

The previous prime is 43225219. The next prime is 43225241. The reversal of 43225221 is 12252234.

It is not a de Polignac number, because 43225221 - 2¹ = 43225219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43225201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36586 + ... + 37748.

It is an arithmetic number, because the mean of its divisors is an integer number (3886596).

Almost surely, 2^43225221 is an apocalyptic number.

It is an amenable number.

43225221 is a deficient number, since it is larger than the sum of its proper divisors (18960315).

43225221 is a wasteful number, since it uses less digits than its factorization.

43225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its digits is 960, while the sum is 21.

The square root of 43225221 is about 6574.5890365862. The cubic root of 43225221 is about 350.9503992378.

Adding to 43225221 its reverse (12252234), we get a palindrome (55477455).

The spelling of 43225221 in words is "forty-three million, two hundred twenty-five thousand, two hundred twenty-one".