231149 has 4 divisors (see below), whose sum is σ = 244764. Its totient is φ = 217536.

The previous prime is 231131. The next prime is 231169. The reversal of 231149 is 941132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 136900 = 307^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 231149 - 2¹² = 227053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231149.

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 231149.

It is not an unprimeable number, because it can be changed into a prime (231109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782 + ... + 6815.

It is an arithmetic number, because the mean of its divisors is an integer number (61191).

2²³¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

231149 is a deficient number, since it is larger than the sum of its proper divisors (13615).

231149 is a wasteful number, since it uses less digits than its factorization.

231149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13614.

The product of its digits is 216, while the sum is 20.

The square root of 231149 is about 480.7795752733. The cubic root of 231149 is about 61.3711139576.

The spelling of 231149 in words is "two hundred thirty-one thousand, one hundred forty-nine".