43433245621 has 2 divisors, whose sum is σ = 43433245622. Its totient is φ = 43433245620.

The previous prime is 43433245607. The next prime is 43433245673. The reversal of 43433245621 is 12654233434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21769527025 + 21663718596 = 147545^2 + 147186^2 .

It is a cyclic number.

It is not a de Polignac number, because 43433245621 - 2¹⁵ = 43433212853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43433240621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21716622810 + 21716622811.

It is an arithmetic number, because the mean of its divisors is an integer number (21716622811).

Almost surely, 2^43433245621 is an apocalyptic number.

It is an amenable number.

43433245621 is a deficient number, since it is larger than the sum of its proper divisors (1).

43433245621 is an equidigital number, since it uses as much as digits as its factorization.

43433245621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 37.

The spelling of 43433245621 in words is "forty-three billion, four hundred thirty-three million, two hundred forty-five thousand, six hundred twenty-one".