55543403 has 16 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 49283712.

The previous prime is 55543343. The next prime is 55543451. The reversal of 55543403 is 30434555.

It is a cyclic number.

It is not a de Polignac number, because 55543403 - 2¹⁰ = 55542379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55543463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115718 + ... + 116196.

It is an arithmetic number, because the mean of its divisors is an integer number (3888000).

Almost surely, 2^55543403 is an apocalyptic number.

55543403 is a deficient number, since it is larger than the sum of its proper divisors (6664597).

55543403 is a wasteful number, since it uses less digits than its factorization.

55543403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 55543403 is about 7452.7446622033. The cubic root of 55543403 is about 381.5435897487.

Adding to 55543403 its reverse (30434555), we get a palindrome (85977958).

The spelling of 55543403 in words is "fifty-five million, five hundred forty-three thousand, four hundred three".