2187231 has 8 divisors (see below), whose sum is σ = 3043200. Its totient is φ = 1394712.

The previous prime is 2187217. The next prime is 2187233. The reversal of 2187231 is 1327812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2187231 - 2⁷ = 2187103 is a prime.

It is a super-2 number, since 2×2187231² = 9567958894722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187233) 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, 15781 + ... + 15918.

It is an arithmetic number, because the mean of its divisors is an integer number (380400).

2^2187231 is an apocalyptic number.

2187231 is a deficient number, since it is larger than the sum of its proper divisors (855969).

2187231 is a wasteful number, since it uses less digits than its factorization.

2187231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31725.

The product of its digits is 672, while the sum is 24.

The square root of 2187231 is about 1478.9290043812. The cubic root of 2187231 is about 129.8070312580.

The spelling of 2187231 in words is "two million, one hundred eighty-seven thousand, two hundred thirty-one".