55555506 has 48 divisors (see below), whose sum is σ = 128831040. Its totient is φ = 17249760.

The previous prime is 55555481. The next prime is 55555517. The reversal of 55555506 is 60555555.

55555506 is a `hidden beast` number, since 55 + 55 + 550 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19531 + ... + 22193.

It is an arithmetic number, because the mean of its divisors is an integer number (2683980).

Almost surely, 2^55555506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64415520).

55555506 is an abundant number, since it is smaller than the sum of its proper divisors (73275534).

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

55555506 is a wasteful number, since it uses less digits than its factorization.

55555506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2748 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The square root of 55555506 is about 7453.5566007108. The cubic root of 55555506 is about 381.5713007305.

The spelling of 55555506 in words is "fifty-five million, five hundred fifty-five thousand, five hundred six".