188231 has 4 divisors (see below), whose sum is σ = 192864. Its totient is φ = 183600.

The previous prime is 188197. The next prime is 188249. The reversal of 188231 is 132881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188231 is a prime.

It is a super-2 number, since 2×188231² = 70861818722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188197 and 188206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (48216).

2¹⁸⁸²³¹ is an apocalyptic number.

188231 is a deficient number, since it is larger than the sum of its proper divisors (4633).

188231 is an equidigital number, since it uses as much as digits as its factorization.

188231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632.

The product of its digits is 384, while the sum is 23.

The square root of 188231 is about 433.8559668830. The cubic root of 188231 is about 57.3099966619.

The spelling of 188231 in words is "one hundred eighty-eight thousand, two hundred thirty-one".