2185156 has 6 divisors (see below), whose sum is σ = 3824030. Its totient is φ = 1092576.

The previous prime is 2185151. The next prime is 2185181. The reversal of 2185156 is 6515812.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 111556 = 1440^2 + 334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273141 + ... + 273148.

2^2185156 is an apocalyptic number.

It is an amenable number.

2185156 is a deficient number, since it is larger than the sum of its proper divisors (1638874).

2185156 is a wasteful number, since it uses less digits than its factorization.

2185156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546293 (or 546291 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 2185156 is about 1478.2273167548. The cubic root of 2185156 is about 129.7659694755.

The spelling of 2185156 in words is "two million, one hundred eighty-five thousand, one hundred fifty-six".