43982221 has 4 divisors (see below), whose sum is σ = 44008444. Its totient is φ = 43956000.

The previous prime is 43982219. The next prime is 43982227. The reversal of 43982221 is 12228934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 42432196 = 1245^2 + 6514^2 .

It is a cyclic number.

It is not a de Polignac number, because 43982221 - 2¹ = 43982219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43982227) 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, 10410 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (11002111).

Almost surely, 2^43982221 is an apocalyptic number.

It is an amenable number.

43982221 is a deficient number, since it is larger than the sum of its proper divisors (26223).

43982221 is a wasteful number, since it uses less digits than its factorization.

43982221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26222.

The product of its digits is 6912, while the sum is 31.

The square root of 43982221 is about 6631.9093027574. The cubic root of 43982221 is about 352.9872770789.

The spelling of 43982221 in words is "forty-three million, nine hundred eighty-two thousand, two hundred twenty-one".