221643119 has 2 divisors, whose sum is σ = 221643120. Its totient is φ = 221643118.

The previous prime is 221643109. The next prime is 221643131. The reversal of 221643119 is 911346122.

221643119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221643119 is a prime.

It is a super-2 number, since 2×221643119² = 98251344400096322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221643091 and 221643100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221643109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110821559 + 110821560.

It is an arithmetic number, because the mean of its divisors is an integer number (110821560).

Almost surely, 2^221643119 is an apocalyptic number.

221643119 is a deficient number, since it is larger than the sum of its proper divisors (1).

221643119 is an equidigital number, since it uses as much as digits as its factorization.

221643119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 221643119 is about 14887.6834665437. The cubic root of 221643119 is about 605.1802563764.

The spelling of 221643119 in words is "two hundred twenty-one million, six hundred forty-three thousand, one hundred nineteen".