55550500 has 48 divisors (see below), whose sum is σ = 122089968. Its totient is φ = 22080000.

The previous prime is 55550491. The next prime is 55550501. The reversal of 55550500 is 505555.

It can be written as a sum of positive squares in 8 ways, for example, as 15936064 + 39614436 = 3992^2 + 6294^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (55550501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120270 + ... + 120730.

It is an arithmetic number, because the mean of its divisors is an integer number (2543541).

Almost surely, 2^55550500 is an apocalyptic number.

55550500 is a gapful number since it is divisible by the number (50) 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 55550500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61044984).

55550500 is an abundant number, since it is smaller than the sum of its proper divisors (66539468).

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

55550500 is a wasteful number, since it uses less digits than its factorization.

55550500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 55550500 is about 7453.2207803070. The cubic root of 55550500 is about 381.5598395004.

The spelling of 55550500 in words is "fifty-five million, five hundred fifty thousand, five hundred".