43106500621 has 2 divisors, whose sum is σ = 43106500622. Its totient is φ = 43106500620.

The previous prime is 43106500601. The next prime is 43106500639. The reversal of 43106500621 is 12600560134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35839790596 + 7266710025 = 189314^2 + 85245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43106500621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43106500621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43106500601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21553250310 + 21553250311.

It is an arithmetic number, because the mean of its divisors is an integer number (21553250311).

Almost surely, 2^43106500621 is an apocalyptic number.

It is an amenable number.

43106500621 is a deficient number, since it is larger than the sum of its proper divisors (1).

43106500621 is an equidigital number, since it uses as much as digits as its factorization.

43106500621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 43106500621 in words is "forty-three billion, one hundred six million, five hundred thousand, six hundred twenty-one".