43896221 has 4 divisors (see below), whose sum is σ = 43992732. Its totient is φ = 43799712.

The previous prime is 43896211. The next prime is 43896253. The reversal of 43896221 is 12269834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12269834 = 2 ⋅6134917.

It can be written as a sum of positive squares in 2 ways, for example, as 27984100 + 15912121 = 5290^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 43896221 - 2¹⁸ = 43634077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43896211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47570 + ... + 48483.

It is an arithmetic number, because the mean of its divisors is an integer number (10998183).

Almost surely, 2^43896221 is an apocalyptic number.

It is an amenable number.

43896221 is a deficient number, since it is larger than the sum of its proper divisors (96511).

43896221 is an equidigital number, since it uses as much as digits as its factorization.

43896221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96510.

The product of its digits is 20736, while the sum is 35.

The square root of 43896221 is about 6625.4223261616. The cubic root of 43896221 is about 352.7570574384.

The spelling of 43896221 in words is "forty-three million, eight hundred ninety-six thousand, two hundred twenty-one".