43225021 has 8 divisors (see below), whose sum is σ = 49477824. Its totient is φ = 36991680.

The previous prime is 43225009. The next prime is 43225031. The reversal of 43225021 is 12052234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43225021 is a prime.

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 43225021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43225031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (6184728).

Almost surely, 2^43225021 is an apocalyptic number.

It is an amenable number.

43225021 is a deficient number, since it is larger than the sum of its proper divisors (6252803).

43225021 is an equidigital number, since it uses as much as digits as its factorization.

43225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 43225021 is about 6574.5738264925. The cubic root of 43225021 is about 350.9498579629.

Adding to 43225021 its reverse (12052234), we get a palindrome (55277255).

The spelling of 43225021 in words is "forty-three million, two hundred twenty-five thousand, twenty-one".