43266573887021 has 2 divisors, whose sum is σ = 43266573887022. Its totient is φ = 43266573887020.

The previous prime is 43266573886999. The next prime is 43266573887063. The reversal of 43266573887021 is 12078837566234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43224378975625 + 42194911396 = 6574525^2 + 205414^2 .

It is a cyclic number.

It is not a de Polignac number, because 43266573887021 - 2⁴² = 38868527375917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43266573857021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21633286943510 + 21633286943511.

It is an arithmetic number, because the mean of its divisors is an integer number (21633286943511).

Almost surely, 2^{43266573887021} is an apocalyptic number.

It is an amenable number.

43266573887021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43266573887021 is an equidigital number, since it uses as much as digits as its factorization.

43266573887021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 62.

The spelling of 43266573887021 in words is "forty-three trillion, two hundred sixty-six billion, five hundred seventy-three million, eight hundred eighty-seven thousand, twenty-one".