43521059 has 2 divisors, whose sum is σ = 43521060. Its totient is φ = 43521058.

The previous prime is 43521053. The next prime is 43521061. The reversal of 43521059 is 95012534.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43521059 - 2¹⁶ = 43455523 is a prime.

Together with 43521061, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2634194 and since 43521059 and 2634194 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43521053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760529 + 21760530.

It is an arithmetic number, because the mean of its divisors is an integer number (21760530).

Almost surely, 2^43521059 is an apocalyptic number.

43521059 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521059 is an equidigital number, since it uses as much as digits as its factorization.

43521059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 43521059 is about 6597.0492646334. The cubic root of 43521059 is about 351.7492268394.

The spelling of 43521059 in words is "forty-three million, five hundred twenty-one thousand, fifty-nine".