43331449261 has 2 divisors, whose sum is σ = 43331449262. Its totient is φ = 43331449260.

The previous prime is 43331449241. The next prime is 43331449307. The reversal of 43331449261 is 16294413334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24700837225 + 18630612036 = 157165^2 + 136494^2 .

It is a cyclic number.

It is not a de Polignac number, because 43331449261 - 2¹¹ = 43331447213 is a prime.

It is a super-2 number, since 2×43331449261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43331449201) 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, 21665724630 + 21665724631.

It is an arithmetic number, because the mean of its divisors is an integer number (21665724631).

Almost surely, 2^43331449261 is an apocalyptic number.

It is an amenable number.

43331449261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43331449261 is an equidigital number, since it uses as much as digits as its factorization.

43331449261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The spelling of 43331449261 in words is "forty-three billion, three hundred thirty-one million, four hundred forty-nine thousand, two hundred sixty-one".