231916 has 12 divisors (see below), whose sum is σ = 417088. Its totient is φ = 112752.

The previous prime is 231901. The next prime is 231919. The reversal of 231916 is 619132.

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

231916 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636 + ... + 931.

2²³¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

231916 is a deficient number, since it is larger than the sum of its proper divisors (185172).

231916 is a wasteful number, since it uses less digits than its factorization.

231916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608 (or 1606 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 231916 is about 481.5765775035. The cubic root of 231916 is about 61.4389196813.

The spelling of 231916 in words is "two hundred thirty-one thousand, nine hundred sixteen".