2157186 has 16 divisors (see below), whose sum is σ = 4344768. Its totient is φ = 714000.

The previous prime is 2157173. The next prime is 2157187. The reversal of 2157186 is 6817512.

It is not an unprimeable number, because it can be changed into a prime (2157187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (271548).

2^2157186 is an apocalyptic number.

2157186 is an abundant number, since it is smaller than the sum of its proper divisors (2187582).

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

2157186 is a wasteful number, since it uses less digits than its factorization.

2157186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its digits is 3360, while the sum is 30.

The square root of 2157186 is about 1468.7361914245. The cubic root of 2157186 is about 129.2099220144.

The spelling of 2157186 in words is "two million, one hundred fifty-seven thousand, one hundred eighty-six".