55506443 has 2 divisors, whose sum is σ = 55506444. Its totient is φ = 55506442.

The previous prime is 55506419. The next prime is 55506449. The reversal of 55506443 is 34460555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55506443 - 2⁶ = 55506379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55506449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753221 + 27753222.

It is an arithmetic number, because the mean of its divisors is an integer number (27753222).

Almost surely, 2^55506443 is an apocalyptic number.

55506443 is a deficient number, since it is larger than the sum of its proper divisors (1).

55506443 is an equidigital number, since it uses as much as digits as its factorization.

55506443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 55506443 is about 7450.2646261727. The cubic root of 55506443 is about 381.4589413513.

Adding to 55506443 its reverse (34460555), we get a palindrome (89966998).

The spelling of 55506443 in words is "fifty-five million, five hundred six thousand, four hundred forty-three".