221431044239 has 2 divisors, whose sum is σ = 221431044240. Its totient is φ = 221431044238.

The previous prime is 221431044223. The next prime is 221431044293. The reversal of 221431044239 is 932440134122.

221431044239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (221431044293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221431044239 - 2⁴ = 221431044223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221431044199 and 221431044208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221431074239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715522119 + 110715522120.

It is an arithmetic number, because the mean of its divisors is an integer number (110715522120).

Almost surely, 2^221431044239 is an apocalyptic number.

221431044239 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431044239 is an equidigital number, since it uses as much as digits as its factorization.

221431044239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 221431044239 in words is "two hundred twenty-one billion, four hundred thirty-one million, forty-four thousand, two hundred thirty-nine".