2000155500 has 432 divisors, whose sum is σ = 7535009664. Its totient is φ = 445132800.

The previous prime is 2000155481. The next prime is 2000155501. The reversal of 2000155500 is 55510002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2000155501) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10363404 + ... + 10363596.

It is an arithmetic number, because the mean of its divisors is an integer number (17442152).

Almost surely, 2^2000155500 is an apocalyptic number.

2000155500 is a gapful number since it is divisible by the number (20) 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 2000155500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3767504832).

2000155500 is an abundant number, since it is smaller than the sum of its proper divisors (5534854164).

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

2000155500 is a wasteful number, since it uses less digits than its factorization.

2000155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 2000155500 is about 44723.0980590567. The cubic root of 2000155500 is about 1259.9537020025.

Adding to 2000155500 its reverse (55510002), we get a palindrome (2055665502).

The spelling of 2000155500 in words is "two billion, one hundred fifty-five thousand, five hundred".