55517443 has 2 divisors, whose sum is σ = 55517444. Its totient is φ = 55517442.

The previous prime is 55517431. The next prime is 55517453. The reversal of 55517443 is 34471555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55517443 - 2⁹ = 55516931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55517399 and 55517408.

It is not a weakly prime, because it can be changed into another prime (55517453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27758721 + 27758722.

It is an arithmetic number, because the mean of its divisors is an integer number (27758722).

Almost surely, 2^55517443 is an apocalyptic number.

55517443 is a deficient number, since it is larger than the sum of its proper divisors (1).

55517443 is an equidigital number, since it uses as much as digits as its factorization.

55517443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 34.

The square root of 55517443 is about 7451.0028184131. The cubic root of 55517443 is about 381.4841382532.

Adding to 55517443 its reverse (34471555), we get a palindrome (89988998).

The spelling of 55517443 in words is "fifty-five million, five hundred seventeen thousand, four hundred forty-three".