231907 has 4 divisors (see below), whose sum is σ = 249760. Its totient is φ = 214056.

The previous prime is 231901. The next prime is 231919. The reversal of 231907 is 709132.

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 231907 - 2⁷ = 231779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231901) 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, 8907 + ... + 8932.

It is an arithmetic number, because the mean of its divisors is an integer number (62440).

2²³¹⁹⁰⁷ is an apocalyptic number.

231907 is a deficient number, since it is larger than the sum of its proper divisors (17853).

231907 is a wasteful number, since it uses less digits than its factorization.

231907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17852.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 231907 is about 481.5672331046. The cubic root of 231907 is about 61.4381249145.

The spelling of 231907 in words is "two hundred thirty-one thousand, nine hundred seven".