231706 has 4 divisors (see below), whose sum is σ = 347562. Its totient is φ = 115852.

The previous prime is 231701. The next prime is 231709. The reversal of 231706 is 607132.

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

It can be written as a sum of positive squares in only one way, i.e., 210681 + 21025 = 459^2 + 145^2 .

It is not an unprimeable number, because it can be changed into a prime (231701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57925 + ... + 57928.

2²³¹⁷⁰⁶ is an apocalyptic number.

231706 is a deficient number, since it is larger than the sum of its proper divisors (115856).

231706 is a wasteful number, since it uses less digits than its factorization.

231706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115855.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 231706 is about 481.3584942639. The cubic root of 231706 is about 61.4203697618.

Adding to 231706 its reverse (607132), we get a palindrome (838838).

The spelling of 231706 in words is "two hundred thirty-one thousand, seven hundred six".