55603311 has 24 divisors (see below), whose sum is σ = 80163840. Its totient is φ = 34265472.

The previous prime is 55603309. The next prime is 55603313. The reversal of 55603311 is 11330655.

55603311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55603309) and next prime (55603313).

It is not a de Polignac number, because 55603311 - 2¹ = 55603309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55603313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50610 + ... + 51696.

It is an arithmetic number, because the mean of its divisors is an integer number (3340160).

Almost surely, 2^55603311 is an apocalyptic number.

55603311 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55603311 is a deficient number, since it is larger than the sum of its proper divisors (24560529).

55603311 is a wasteful number, since it uses less digits than its factorization.

55603311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 55603311 is about 7456.7627694597. The cubic root of 55603311 is about 381.6807155468.

Adding to 55603311 its reverse (11330655), we get a palindrome (66933966).

The spelling of 55603311 in words is "fifty-five million, six hundred three thousand, three hundred eleven".