2173156 has 6 divisors (see below), whose sum is σ = 3803030. Its totient is φ = 1086576.

The previous prime is 2173153. The next prime is 2173183. The reversal of 2173156 is 6513712.

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 168100 = 1416^2 + 410^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2173156.

It is not an unprimeable number, because it can be changed into a prime (2173151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271641 + ... + 271648.

2^2173156 is an apocalyptic number.

It is an amenable number.

2173156 is a deficient number, since it is larger than the sum of its proper divisors (1629874).

2173156 is a wasteful number, since it uses less digits than its factorization.

2173156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543293 (or 543291 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 2173156 is about 1474.1628132605. The cubic root of 2173156 is about 129.5279924382.

Adding to 2173156 its reverse (6513712), we get a palindrome (8686868).

The spelling of 2173156 in words is "two million, one hundred seventy-three thousand, one hundred fifty-six".