43521353 has 2 divisors, whose sum is σ = 43521354. Its totient is φ = 43521352.

The previous prime is 43521319. The next prime is 43521383. The reversal of 43521353 is 35312534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32684089 + 10837264 = 5717^2 + 3292^2 .

It is a cyclic number.

It is not a de Polignac number, because 43521353 - 2¹⁶ = 43455817 is a prime.

It is not a weakly prime, because it can be changed into another prime (43521383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760676 + 21760677.

It is an arithmetic number, because the mean of its divisors is an integer number (21760677).

Almost surely, 2^43521353 is an apocalyptic number.

It is an amenable number.

43521353 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521353 is an equidigital number, since it uses as much as digits as its factorization.

43521353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 26.

The square root of 43521353 is about 6597.0715472852. The cubic root of 43521353 is about 351.7500189007.

Adding to 43521353 its reverse (35312534), we get a palindrome (78833887).

The spelling of 43521353 in words is "forty-three million, five hundred twenty-one thousand, three hundred fifty-three".