55603785 has 32 divisors (see below), whose sum is σ = 96197760. Its totient is φ = 27330048.

The previous prime is 55603781. The next prime is 55603813. The reversal of 55603785 is 58730655.

55603785 is a nontrivial binomial coefficient, being equal to C(10546, 2).

It is not a de Polignac number, because 55603785 - 2² = 55603781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55603781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7909 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (3006180).

Almost surely, 2^55603785 is an apocalyptic number.

55603785 is the 10545-th triangular number and also the 5273-rd hexagonal number.

It is an amenable number.

55603785 is a deficient number, since it is larger than the sum of its proper divisors (40593975).

55603785 is a wasteful number, since it uses less digits than its factorization.

55603785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 55603785 is about 7456.7945526211. The cubic root of 55603785 is about 381.6818001114.

The spelling of 55603785 in words is "fifty-five million, six hundred three thousand, seven hundred eighty-five".