2202156 has 72 divisors (see below), whose sum is σ = 6237504. Its totient is φ = 649440.

The previous prime is 2202149. The next prime is 2202169. The reversal of 2202156 is 6512022.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26491 + ... + 26573.

It is an arithmetic number, because the mean of its divisors is an integer number (86632).

2^2202156 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 2202156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3118752).

2202156 is an abundant number, since it is smaller than the sum of its proper divisors (4035348).

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

2202156 is a wasteful number, since it uses less digits than its factorization.

2202156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2202156 is about 1483.9663068951. The cubic root of 2202156 is about 130.1016168012.

Adding to 2202156 its reverse (6512022), we get a palindrome (8714178).

The spelling of 2202156 in words is "two million, two hundred two thousand, one hundred fifty-six".