55553603 has 18 divisors (see below), whose sum is σ = 68666076. Its totient is φ = 44804928.

The previous prime is 55553591. The next prime is 55553609. The reversal of 55553603 is 30635555.

It is not a de Polignac number, because 55553603 - 2⁸ = 55553347 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55553603.

It is not an unprimeable number, because it can be changed into a prime (55553609) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12200 + ... + 16122.

It is an arithmetic number, because the mean of its divisors is an integer number (3814782).

Almost surely, 2^55553603 is an apocalyptic number.

55553603 is a deficient number, since it is larger than the sum of its proper divisors (13112473).

55553603 is a wasteful number, since it uses less digits than its factorization.

55553603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3947 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 32.

The square root of 55553603 is about 7453.4289424398. The cubic root of 55553603 is about 381.5669438958.

The spelling of 55553603 in words is "fifty-five million, five hundred fifty-three thousand, six hundred three".