43055242421 has 2 divisors, whose sum is σ = 43055242422. Its totient is φ = 43055242420.

The previous prime is 43055242369. The next prime is 43055242469. The reversal of 43055242421 is 12424255034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42287398321 + 767844100 = 205639^2 + 27710^2 .

It is a cyclic number.

It is not a de Polignac number, because 43055242421 - 2¹⁸ = 43054980277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43055242621) 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, 21527621210 + 21527621211.

It is an arithmetic number, because the mean of its divisors is an integer number (21527621211).

Almost surely, 2^43055242421 is an apocalyptic number.

It is an amenable number.

43055242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43055242421 is an equidigital number, since it uses as much as digits as its factorization.

43055242421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 43055242421 its reverse (12424255034), we get a palindrome (55479497455).

The spelling of 43055242421 in words is "forty-three billion, fifty-five million, two hundred forty-two thousand, four hundred twenty-one".