55100556 has 72 divisors (see below), whose sum is σ = 163092384. Its totient is φ = 15356160.

The previous prime is 55100537. The next prime is 55100557. The reversal of 55100556 is 65500155.

55100556 is a `hidden beast` number, since 5 + 5 + 100 + 556 = 666.

It is not an unprimeable number, because it can be changed into a prime (55100557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7666 + ... + 12998.

It is an arithmetic number, because the mean of its divisors is an integer number (2265172).

Almost surely, 2^55100556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55100556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81546192).

55100556 is an abundant number, since it is smaller than the sum of its proper divisors (107991828).

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

55100556 is a wasteful number, since it uses less digits than its factorization.

55100556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391 (or 5386 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55100556 is about 7422.9748753448. The cubic root of 55100556 is about 380.5268684228.

The spelling of 55100556 in words is "fifty-five million, one hundred thousand, five hundred fifty-six".