166231 has 8 divisors (see below), whose sum is σ = 188720. Its totient is φ = 145152.

The previous prime is 166219. The next prime is 166237. The reversal of 166231 is 132661.

166231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 166231 - 2⁹ = 165719 is a prime.

It is a super-2 number, since 2×166231² = 55265490722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166199 and 166208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166237) 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, 90 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (23590).

2¹⁶⁶²³¹ is an apocalyptic number.

166231 is a deficient number, since it is larger than the sum of its proper divisors (22489).

166231 is a wasteful number, since it uses less digits than its factorization.

166231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its digits is 216, while the sum is 19.

The square root of 166231 is about 407.7143607969. The cubic root of 166231 is about 54.9841276513.

Adding to 166231 its reverse (132661), we get a palindrome (298892).

The spelling of 166231 in words is "one hundred sixty-six thousand, two hundred thirty-one".