55050000 has 120 divisors (see below), whose sum is σ = 178238592. Its totient is φ = 14640000.

The previous prime is 55049983. The next prime is 55050001. The reversal of 55050000 is 5055.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (55050001) 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, 149817 + ... + 150183.

Almost surely, 2^55050000 is an apocalyptic number.

55050000 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 55050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89119296).

55050000 is an abundant number, since it is smaller than the sum of its proper divisors (123188592).

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

55050000 is an equidigital number, since it uses as much as digits as its factorization.

55050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 15.

The square root of 55050000 is about 7419.5687206198. The cubic root of 55050000 is about 380.4104521559.

Adding to 55050000 its reverse (5055), we get a palindrome (55055055).

The spelling of 55050000 in words is "fifty-five million, fifty thousand".