43144221 has 4 divisors (see below), whose sum is σ = 57525632. Its totient is φ = 28762812.

The previous prime is 43144217. The next prime is 43144229. The reversal of 43144221 is 12244134.

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 not a de Polignac number, because 43144221 - 2² = 43144217 is a prime.

It is a super-2 number, since 2×43144221² = 3722847611393682, 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 (43144229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7190701 + ... + 7190706.

It is an arithmetic number, because the mean of its divisors is an integer number (14381408).

Almost surely, 2^43144221 is an apocalyptic number.

It is an amenable number.

43144221 is a deficient number, since it is larger than the sum of its proper divisors (14381411).

43144221 is a wasteful number, since it uses less digits than its factorization.

43144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14381410.

The product of its digits is 768, while the sum is 21.

The square root of 43144221 is about 6568.4260671793. The cubic root of 43144221 is about 350.7310461481.

Adding to 43144221 its reverse (12244134), we get a palindrome (55388355).

It can be divided in two parts, 43144 and 221, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 43144221 in words is "forty-three million, one hundred forty-four thousand, two hundred twenty-one".