43554183121 has 2 divisors, whose sum is σ = 43554183122. Its totient is φ = 43554183120.

The previous prime is 43554183091. The next prime is 43554183139. The reversal of 43554183121 is 12138145534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36647742096 + 6906441025 = 191436^2 + 83105^2 .

It is a cyclic number.

It is not a de Polignac number, because 43554183121 - 2¹⁹ = 43553658833 is a prime.

It is not a weakly prime, because it can be changed into another prime (43554183221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21777091560 + 21777091561.

It is an arithmetic number, because the mean of its divisors is an integer number (21777091561).

Almost surely, 2^43554183121 is an apocalyptic number.

It is an amenable number.

43554183121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43554183121 is an equidigital number, since it uses as much as digits as its factorization.

43554183121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The spelling of 43554183121 in words is "forty-three billion, five hundred fifty-four million, one hundred eighty-three thousand, one hundred twenty-one".