2000155 has 4 divisors (see below), whose sum is σ = 2400192. Its totient is φ = 1600120.

The previous prime is 2000153. The next prime is 2000177. The reversal of 2000155 is 5510002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2000155 - 2¹ = 2000153 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

2000155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2000153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200011 + ... + 200020.

It is an arithmetic number, because the mean of its divisors is an integer number (600048).

2^2000155 is an apocalyptic number.

2000155 is a deficient number, since it is larger than the sum of its proper divisors (400037).

2000155 is an equidigital number, since it uses as much as digits as its factorization.

2000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400036.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 2000155 is about 1414.2683620869. The cubic root of 2000155 is about 125.9953597015.

Adding to 2000155 its reverse (5510002), we get a palindrome (7510157).

The spelling of 2000155 in words is "two million, one hundred fifty-five", and thus it is an aban number.