2013156 has 18 divisors (see below), whose sum is σ = 5088902. Its totient is φ = 671040.

The previous prime is 2013127. The next prime is 2013163. The reversal of 2013156 is 6513102.

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 8100 = 1416^2 + 90^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27925 + ... + 27996.

2^2013156 is an apocalyptic number.

It is an amenable number.

2013156 is an abundant number, since it is smaller than the sum of its proper divisors (3075746).

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

2013156 is a wasteful number, since it uses less digits than its factorization.

2013156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55931 (or 55926 counting only the distinct ones).

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

The square root of 2013156 is about 1418.8572866924. The cubic root of 2013156 is about 126.2677601391.

Adding to 2013156 its reverse (6513102), we get a palindrome (8526258).

It can be divided in two parts, 2013 and 156, that multiplied together give a triangular number (314028 = T₇₉₂).

The spelling of 2013156 in words is "two million, thirteen thousand, one hundred fifty-six".