230981 has 4 divisors (see below), whose sum is σ = 238464. Its totient is φ = 223500.

The previous prime is 230977. The next prime is 230999. The reversal of 230981 is 189032.

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 230981 - 2² = 230977 is a prime.

It is a super-2 number, since 2×230981² = 106704444722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

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 230981.

It is not an unprimeable number, because it can be changed into a prime (230941) 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, 3695 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (59616).

2²³⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

230981 is a deficient number, since it is larger than the sum of its proper divisors (7483).

230981 is an equidigital number, since it uses as much as digits as its factorization.

230981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 230981 is about 480.6048272750. The cubic root of 230981 is about 61.3562420986.

The spelling of 230981 in words is "two hundred thirty thousand, nine hundred eighty-one".