219890071 has 2 divisors, whose sum is σ = 219890072. Its totient is φ = 219890070.

The previous prime is 219890039. The next prime is 219890113. The reversal of 219890071 is 170098912.

219890071 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 not a de Polignac number, because 219890071 - 2⁵ = 219890039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219890071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219830071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109945035 + 109945036.

It is an arithmetic number, because the mean of its divisors is an integer number (109945036).

Almost surely, 2^219890071 is an apocalyptic number.

219890071 is a deficient number, since it is larger than the sum of its proper divisors (1).

219890071 is an equidigital number, since it uses as much as digits as its factorization.

219890071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 219890071 is about 14828.6908053274. The cubic root of 219890071 is about 603.5805083570.

The spelling of 219890071 in words is "two hundred nineteen million, eight hundred ninety thousand, seventy-one".