55005556 has 6 divisors (see below), whose sum is σ = 96259730. Its totient is φ = 27502776.

The previous prime is 55005553. The next prime is 55005583. The reversal of 55005556 is 65550055.

55005556 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 only one way, i.e., 50637456 + 4368100 = 7116^2 + 2090^2 .

It is a super-2 number, since 2×55005556² = 6051222381738272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005553) 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 as a sum of consecutive naturals, namely, 6875691 + ... + 6875698.

Almost surely, 2^55005556 is an apocalyptic number.

It is an amenable number.

55005556 is a deficient number, since it is larger than the sum of its proper divisors (41254174).

55005556 is a wasteful number, since it uses less digits than its factorization.

55005556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751393 (or 13751391 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 55005556 is about 7416.5730630797. The cubic root of 55005556 is about 380.3080512231.

The spelling of 55005556 in words is "fifty-five million, five thousand, five hundred fifty-six".