55122443 has 4 divisors (see below), whose sum is σ = 55150920. Its totient is φ = 55093968.

The previous prime is 55122437. The next prime is 55122451. The reversal of 55122443 is 34422155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34422155 = 5 ⋅6884431.

It is a cyclic number.

It is not a de Polignac number, because 55122443 - 2⁸ = 55122187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55122413) 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 in 3 ways as a sum of consecutive naturals, for example, 11105 + ... + 15282.

It is an arithmetic number, because the mean of its divisors is an integer number (13787730).

Almost surely, 2^55122443 is an apocalyptic number.

55122443 is a deficient number, since it is larger than the sum of its proper divisors (28477).

55122443 is a wasteful number, since it uses less digits than its factorization.

55122443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28476.

The product of its digits is 4800, while the sum is 26.

The square root of 55122443 is about 7424.4490031247. The cubic root of 55122443 is about 380.5772459487.

Adding to 55122443 its reverse (34422155), we get a palindrome (89544598).

The spelling of 55122443 in words is "fifty-five million, one hundred twenty-two thousand, four hundred forty-three".