43321312481 has 2 divisors, whose sum is σ = 43321312482. Its totient is φ = 43321312480.

The previous prime is 43321312427. The next prime is 43321312499. The reversal of 43321312481 is 18421312334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42182587456 + 1138725025 = 205384^2 + 33745^2 .

It is a cyclic number.

It is not a de Polignac number, because 43321312481 - 2⁶ = 43321312417 is a prime.

It is a super-2 number, since 2×43321312481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43321312681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21660656240 + 21660656241.

It is an arithmetic number, because the mean of its divisors is an integer number (21660656241).

Almost surely, 2^43321312481 is an apocalyptic number.

It is an amenable number.

43321312481 is a deficient number, since it is larger than the sum of its proper divisors (1).

43321312481 is an equidigital number, since it uses as much as digits as its factorization.

43321312481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The spelling of 43321312481 in words is "forty-three billion, three hundred twenty-one million, three hundred twelve thousand, four hundred eighty-one".