2103156 has 72 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 618240.

The previous prime is 2103151. The next prime is 2103163. The reversal of 2103156 is 6513012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103151) 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, 18556 + ... + 18668.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2^2103156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2103156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2987712).

2103156 is an abundant number, since it is smaller than the sum of its proper divisors (3872268).

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

2103156 is a wasteful number, since it uses less digits than its factorization.

2103156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2103156 is about 1450.2261892546. The cubic root of 2103156 is about 128.1220353072.

Adding to 2103156 its reverse (6513012), we get a palindrome (8616168).

The spelling of 2103156 in words is "two million, one hundred three thousand, one hundred fifty-six".