55509601 has 12 divisors (see below), whose sum is σ = 64816752. Its totient is φ = 47399688.

The previous prime is 55509599. The next prime is 55509637. The reversal of 55509601 is 10690555.

It is a happy number.

It is not a de Polignac number, because 55509601 - 2¹ = 55509599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55509691) 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 11 ways as a sum of consecutive naturals, for example, 11866 + ... + 15868.

It is an arithmetic number, because the mean of its divisors is an integer number (5401396).

Almost surely, 2^55509601 is an apocalyptic number.

It is an amenable number.

55509601 is a deficient number, since it is larger than the sum of its proper divisors (9307151).

55509601 is a wasteful number, since it uses less digits than its factorization.

55509601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 55509601 is about 7450.4765619388. The cubic root of 55509601 is about 381.4661754934.

It can be divided in two parts, 5550 and 9601, that added together give a palindrome (15151).

The spelling of 55509601 in words is "fifty-five million, five hundred nine thousand, six hundred one".