231097 has 4 divisors (see below), whose sum is σ = 243280. Its totient is φ = 218916.

The previous prime is 231079. The next prime is 231107. The reversal of 231097 is 790132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231097 - 2⁷ = 230969 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231017) 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, 6063 + ... + 6100.

It is an arithmetic number, because the mean of its divisors is an integer number (60820).

2²³¹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

231097 is a deficient number, since it is larger than the sum of its proper divisors (12183).

231097 is a wasteful number, since it uses less digits than its factorization.

231097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12182.

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

The square root of 231097 is about 480.7254933951. The cubic root of 231097 is about 61.3665115334.

The spelling of 231097 in words is "two hundred thirty-one thousand, ninety-seven".