55555552 has 48 divisors (see below), whose sum is σ = 119281680. Its totient is φ = 25316352.

The previous prime is 55555547. The next prime is 55555553. The reversal of 55555552 is 25555555.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33724 + ... + 35332.

It is an arithmetic number, because the mean of its divisors is an integer number (2485035).

Almost surely, 2^55555552 is an apocalyptic number.

55555552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59640840).

55555552 is an abundant number, since it is smaller than the sum of its proper divisors (63726128).

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

55555552 is a wasteful number, since it uses less digits than its factorization.

55555552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715 (or 1707 counting only the distinct ones).

The product of its digits is 156250, while the sum is 37.

The square root of 55555552 is about 7453.5596864854. The cubic root of 55555552 is about 381.5714060443.

The spelling of 55555552 in words is "fifty-five million, five hundred fifty-five thousand, five hundred fifty-two".