233230981 has 2 divisors, whose sum is σ = 233230982. Its totient is φ = 233230980.

The previous prime is 233230979. The next prime is 233231027. The reversal of 233230981 is 189032332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233172900 + 58081 = 15270^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 233230981 - 2¹ = 233230979 is a prime.

It is a super-2 number, since 2×233230981² = 108793380996444722, which contains 22 as substring.

Together with 233230979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233230931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116615490 + 116615491.

It is an arithmetic number, because the mean of its divisors is an integer number (116615491).

Almost surely, 2^233230981 is an apocalyptic number.

It is an amenable number.

233230981 is a deficient number, since it is larger than the sum of its proper divisors (1).

233230981 is an equidigital number, since it uses as much as digits as its factorization.

233230981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 233230981 is about 15271.9016825018. The cubic root of 233230981 is about 615.5482198248.

The spelling of 233230981 in words is "two hundred thirty-three million, two hundred thirty thousand, nine hundred eighty-one".