221889387139 has 4 divisors (see below), whose sum is σ = 253587871024. Its totient is φ = 190190903256.

The previous prime is 221889387127. The next prime is 221889387169. The reversal of 221889387139 is 931783988122.

221889387139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221889387139 - 2¹⁷ = 221889256067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221889387169) 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 in 3 ways as a sum of consecutive naturals, for example, 15849241932 + ... + 15849241945.

It is an arithmetic number, because the mean of its divisors is an integer number (63396967756).

Almost surely, 2^221889387139 is an apocalyptic number.

221889387139 is a deficient number, since it is larger than the sum of its proper divisors (31698483885).

221889387139 is an equidigital number, since it uses as much as digits as its factorization.

221889387139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31698483884.

The product of its digits is 10450944, while the sum is 61.

It can be divided in two parts, 2218893 and 87139, that added together give a palindrome (2306032).

The spelling of 221889387139 in words is "two hundred twenty-one billion, eight hundred eighty-nine million, three hundred eighty-seven thousand, one hundred thirty-nine".