221143019 has 2 divisors, whose sum is σ = 221143020. Its totient is φ = 221143018.

The previous prime is 221143007. The next prime is 221143031. The reversal of 221143019 is 910341122.

It is a balanced prime because it is at equal distance from previous prime (221143007) and next prime (221143031).

It is a cyclic number.

It is not a de Polignac number, because 221143019 - 2⁴ = 221143003 is a prime.

It is a super-2 number, since 2×221143019² = 97808469704868722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221142985 and 221143003.

It is not a weakly prime, because it can be changed into another prime (221143049) 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, 110571509 + 110571510.

It is an arithmetic number, because the mean of its divisors is an integer number (110571510).

Almost surely, 2^221143019 is an apocalyptic number.

221143019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221143019 is an equidigital number, since it uses as much as digits as its factorization.

221143019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 221143019 is about 14870.8782188545. The cubic root of 221143019 is about 604.7247515091.

The spelling of 221143019 in words is "two hundred twenty-one million, one hundred forty-three thousand, nineteen".