221998319239 has 2 divisors, whose sum is σ = 221998319240. Its totient is φ = 221998319238.

The previous prime is 221998319219. The next prime is 221998319293. The reversal of 221998319239 is 932913899122.

Together with next prime (221998319293) 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 221998319239 - 2¹³ = 221998311047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221998319219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110999159619 + 110999159620.

It is an arithmetic number, because the mean of its divisors is an integer number (110999159620).

Almost surely, 2^221998319239 is an apocalyptic number.

221998319239 is a deficient number, since it is larger than the sum of its proper divisors (1).

221998319239 is an equidigital number, since it uses as much as digits as its factorization.

221998319239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 58.

It can be divided in two parts, 22199 and 8319239, that added together give a palindrome (8341438).

The spelling of 221998319239 in words is "two hundred twenty-one billion, nine hundred ninety-eight million, three hundred nineteen thousand, two hundred thirty-nine".