55103443 has 4 divisors (see below), whose sum is σ = 58344840. Its totient is φ = 51862048.

The previous prime is 55103437. The next prime is 55103449. The reversal of 55103443 is 34430155.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55103437) and next prime (55103449).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55103443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55103449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620673 + ... + 1620706.

It is an arithmetic number, because the mean of its divisors is an integer number (14586210).

Almost surely, 2^55103443 is an apocalyptic number.

55103443 is a deficient number, since it is larger than the sum of its proper divisors (3241397).

55103443 is a wasteful number, since it uses less digits than its factorization.

55103443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241396.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 55103443 is about 7423.1693366109. The cubic root of 55103443 is about 380.5335142232.

Adding to 55103443 its reverse (34430155), we get a palindrome (89533598).

The spelling of 55103443 in words is "fifty-five million, one hundred three thousand, four hundred forty-three".