43442342261 has 2 divisors, whose sum is σ = 43442342262. Its totient is φ = 43442342260.

The previous prime is 43442342233. The next prime is 43442342327. The reversal of 43442342261 is 16224324434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33016707025 + 10425635236 = 181705^2 + 102106^2 .

It is a cyclic number.

It is not a de Polignac number, because 43442342261 - 2¹⁴ = 43442325877 is a prime.

It is a super-2 number, since 2×43442342261² (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 (43442042261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21721171130 + 21721171131.

It is an arithmetic number, because the mean of its divisors is an integer number (21721171131).

Almost surely, 2^43442342261 is an apocalyptic number.

It is an amenable number.

43442342261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43442342261 is an equidigital number, since it uses as much as digits as its factorization.

43442342261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 35.

Adding to 43442342261 its reverse (16224324434), we get a palindrome (59666666695).

The spelling of 43442342261 in words is "forty-three billion, four hundred forty-two million, three hundred forty-two thousand, two hundred sixty-one".