43521053 has 2 divisors, whose sum is σ = 43521054. Its totient is φ = 43521052.

The previous prime is 43521047. The next prime is 43521059. The reversal of 43521053 is 35012534.

It is a balanced prime because it is at equal distance from previous prime (43521047) and next prime (43521059).

It can be written as a sum of positive squares in only one way, i.e., 35557369 + 7963684 = 5963^2 + 2822^2 .

It is a cyclic number.

It is not a de Polignac number, because 43521053 - 2⁸ = 43520797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43521059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760526 + 21760527.

It is an arithmetic number, because the mean of its divisors is an integer number (21760527).

Almost surely, 2^43521053 is an apocalyptic number.

It is an amenable number.

43521053 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521053 is an equidigital number, since it uses as much as digits as its factorization.

43521053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 43521053 is about 6597.0488098846. The cubic root of 43521053 is about 351.7492106748.

Adding to 43521053 its reverse (35012534), we get a palindrome (78533587).

The spelling of 43521053 in words is "forty-three million, five hundred twenty-one thousand, fifty-three".