231913 has 8 divisors (see below), whose sum is σ = 262080. Its totient is φ = 203280.

The previous prime is 231901. The next prime is 231919. The reversal of 231913 is 319132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-231913 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (231919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2²³¹⁹¹³ is an apocalyptic number.

It is an amenable number.

231913 is a deficient number, since it is larger than the sum of its proper divisors (30167).

231913 is a wasteful number, since it uses less digits than its factorization.

231913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 162, while the sum is 19.

The square root of 231913 is about 481.5734627240. The cubic root of 231913 is about 61.4386547614.

It can be divided in two parts, 2319 and 13, that added together give a palindrome (2332).

The spelling of 231913 in words is "two hundred thirty-one thousand, nine hundred thirteen".