43544313121 has 2 divisors, whose sum is σ = 43544313122. Its totient is φ = 43544313120.

The previous prime is 43544313083. The next prime is 43544313143. The reversal of 43544313121 is 12131344534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43472250000 + 72063121 = 208500^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 43544313121 - 2¹⁷ = 43544182049 is a prime.

It is a super-2 number, since 2×43544313121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43544313151) 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, 21772156560 + 21772156561.

It is an arithmetic number, because the mean of its divisors is an integer number (21772156561).

Almost surely, 2^43544313121 is an apocalyptic number.

It is an amenable number.

43544313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43544313121 is an equidigital number, since it uses as much as digits as its factorization.

43544313121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

Adding to 43544313121 its reverse (12131344534), we get a palindrome (55675657655).

The spelling of 43544313121 in words is "forty-three billion, five hundred forty-four million, three hundred thirteen thousand, one hundred twenty-one".