231207 has 4 divisors (see below), whose sum is σ = 308280. Its totient is φ = 154136.

The previous prime is 231197. The next prime is 231223. The reversal of 231207 is 702132.

231207 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 231207 - 2⁷ = 231079 is a prime.

It is an Ulam number.

It is a D-number.

231207 is strictly pandigital in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231207.

It is not an unprimeable number, because it can be changed into a prime (231277) 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, 38532 + ... + 38537.

It is an arithmetic number, because the mean of its divisors is an integer number (77070).

2²³¹²⁰⁷ is an apocalyptic number.

231207 is a deficient number, since it is larger than the sum of its proper divisors (77073).

231207 is an equidigital number, since it uses as much as digits as its factorization.

231207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77072.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 231207 is about 480.8398901922. The cubic root of 231207 is about 61.3762466165.

Adding to 231207 its reverse (702132), we get a palindrome (933339).

The spelling of 231207 in words is "two hundred thirty-one thousand, two hundred seven".