231321383 has 2 divisors, whose sum is σ = 231321384. Its totient is φ = 231321382.

The previous prime is 231321379. The next prime is 231321407. The reversal of 231321383 is 383123132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231321383 - 2² = 231321379 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231221383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660691 + 115660692.

It is an arithmetic number, because the mean of its divisors is an integer number (115660692).

Almost surely, 2^231321383 is an apocalyptic number.

231321383 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321383 is an equidigital number, since it uses as much as digits as its factorization.

231321383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 231321383 is about 15209.2532032312. The cubic root of 231321383 is about 613.8636632431.

The spelling of 231321383 in words is "two hundred thirty-one million, three hundred twenty-one thousand, three hundred eighty-three".