55709556 has 24 divisors (see below), whose sum is σ = 148559040. Its totient is φ = 15916992.

The previous prime is 55709513. The next prime is 55709557. The reversal of 55709556 is 65590755.

55709556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55709557) 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 7 ways as a sum of consecutive naturals, for example, 331521 + ... + 331688.

It is an arithmetic number, because the mean of its divisors is an integer number (6189960).

Almost surely, 2^55709556 is an apocalyptic number.

It is an amenable number.

55709556 is an abundant number, since it is smaller than the sum of its proper divisors (92849484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55709556 is a wasteful number, since it uses less digits than its factorization.

55709556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663223 (or 663221 counting only the distinct ones).

The product of its (nonzero) digits is 236250, while the sum is 42.

The square root of 55709556 is about 7463.8834396043. The cubic root of 55709556 is about 381.9236619111.

It can be divided in two parts, 55709 and 556, that added together give a palindrome (56265).

The spelling of 55709556 in words is "fifty-five million, seven hundred nine thousand, five hundred fifty-six".