231130643 has 2 divisors, whose sum is σ = 231130644. Its totient is φ = 231130642.

The previous prime is 231130639. The next prime is 231130673. The reversal of 231130643 is 346031132.

231130643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231130643 - 2² = 231130639 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (231130673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115565321 + 115565322.

It is an arithmetic number, because the mean of its divisors is an integer number (115565322).

Almost surely, 2^231130643 is an apocalyptic number.

231130643 is a deficient number, since it is larger than the sum of its proper divisors (1).

231130643 is an equidigital number, since it uses as much as digits as its factorization.

231130643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 231130643 is about 15202.9813852415. The cubic root of 231130643 is about 613.6948929220.

Adding to 231130643 its reverse (346031132), we get a palindrome (577161775).

The spelling of 231130643 in words is "two hundred thirty-one million, one hundred thirty thousand, six hundred forty-three".