231221083 has 2 divisors, whose sum is σ = 231221084. Its totient is φ = 231221082.

The previous prime is 231221077. The next prime is 231221113. The reversal of 231221083 is 380122132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231221083 is a prime.

It is not a weakly prime, because it can be changed into another prime (231221183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115610541 + 115610542.

It is an arithmetic number, because the mean of its divisors is an integer number (115610542).

Almost surely, 2^231221083 is an apocalyptic number.

231221083 is a deficient number, since it is larger than the sum of its proper divisors (1).

231221083 is an equidigital number, since it uses as much as digits as its factorization.

231221083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 231221083 is about 15205.9555109174. The cubic root of 231221083 is about 613.7749274971.

The spelling of 231221083 in words is "two hundred thirty-one million, two hundred twenty-one thousand, eighty-three".