55135665 has 36 divisors (see below), whose sum is σ = 103256244. Its totient is φ = 27055296.

The previous prime is 55135621. The next prime is 55135667. The reversal of 55135665 is 56653155.

55135665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 41563809 = 3684^2 + 6447^2 .

It is not a de Polignac number, because 55135665 - 2¹⁰ = 55134641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55135667) 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 35 ways as a sum of consecutive naturals, for example, 179442 + ... + 179748.

It is an arithmetic number, because the mean of its divisors is an integer number (2868229).

Almost surely, 2^55135665 is an apocalyptic number.

It is an amenable number.

55135665 is a deficient number, since it is larger than the sum of its proper divisors (48120579).

55135665 is a wasteful number, since it uses less digits than its factorization.

55135665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 328 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55135665 is about 7425.3393861830. The cubic root of 55135665 is about 380.6076726968.

The spelling of 55135665 in words is "fifty-five million, one hundred thirty-five thousand, six hundred sixty-five".