43521563087 has 2 divisors, whose sum is σ = 43521563088. Its totient is φ = 43521563086.

The previous prime is 43521563011. The next prime is 43521563207. The reversal of 43521563087 is 78036512534.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43521563087 - 2⁸ = 43521562831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43521563587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760781543 + 21760781544.

It is an arithmetic number, because the mean of its divisors is an integer number (21760781544).

Almost surely, 2^43521563087 is an apocalyptic number.

43521563087 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521563087 is an equidigital number, since it uses as much as digits as its factorization.

43521563087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 43521563087 in words is "forty-three billion, five hundred twenty-one million, five hundred sixty-three thousand, eighty-seven".