55111604 has 24 divisors (see below), whose sum is σ = 97782048. Its totient is φ = 27177120.

The previous prime is 55111601. The next prime is 55111613. The reversal of 55111604 is 40611155.

It is a self number, because there is not a number n which added to its sum of digits gives 55111604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117779 + ... + 118245.

It is an arithmetic number, because the mean of its divisors is an integer number (4074252).

Almost surely, 2^55111604 is an apocalyptic number.

It is an amenable number.

55111604 is a deficient number, since it is larger than the sum of its proper divisors (42670444).

55111604 is a wasteful number, since it uses less digits than its factorization.

55111604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 55111604 is about 7423.7190140791. The cubic root of 55111604 is about 380.5522993815.

Adding to 55111604 its reverse (40611155), we get a palindrome (95722759).

The spelling of 55111604 in words is "fifty-five million, one hundred eleven thousand, six hundred four".