43221053 has 4 divisors (see below), whose sum is σ = 43279968. Its totient is φ = 43162140.

The previous prime is 43221047. The next prime is 43221083. The reversal of 43221053 is 35012234.

It is a happy number.

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 43221053 - 2⁸ = 43220797 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 (43221043) 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, 28343 + ... + 29828.

It is an arithmetic number, because the mean of its divisors is an integer number (10819992).

Almost surely, 2^43221053 is an apocalyptic number.

It is an amenable number.

43221053 is a deficient number, since it is larger than the sum of its proper divisors (58915).

43221053 is an equidigital number, since it uses as much as digits as its factorization.

43221053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58914.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 43221053 is about 6574.2720509574. The cubic root of 43221053 is about 350.9391187227.

Adding to 43221053 its reverse (35012234), we get a palindrome (78233287).

The spelling of 43221053 in words is "forty-three million, two hundred twenty-one thousand, fifty-three".