43473221 has 4 divisors (see below), whose sum is σ = 47425344. Its totient is φ = 39521100.

The previous prime is 43473217. The next prime is 43473239. The reversal of 43473221 is 12237434.

43473221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43473221 - 2² = 43473217 is a prime.

It is a super-2 number, since 2×43473221² = 3779841888229682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43473271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1976045 + ... + 1976066.

It is an arithmetic number, because the mean of its divisors is an integer number (11856336).

Almost surely, 2^43473221 is an apocalyptic number.

It is an amenable number.

43473221 is a deficient number, since it is larger than the sum of its proper divisors (3952123).

43473221 is a wasteful number, since it uses less digits than its factorization.

43473221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952122.

The product of its digits is 4032, while the sum is 26.

The square root of 43473221 is about 6593.4225558506. The cubic root of 43473221 is about 351.6202996102.

The spelling of 43473221 in words is "forty-three million, four hundred seventy-three thousand, two hundred twenty-one".