219040181 has 2 divisors, whose sum is σ = 219040182. Its totient is φ = 219040180.

The previous prime is 219040169. The next prime is 219040249. The reversal of 219040181 is 181040912.

219040181 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 can be written as a sum of positive squares in only one way, i.e., 172922500 + 46117681 = 13150^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 219040181 - 2⁶ = 219040117 is a prime.

It is a super-2 number, since 2×219040181² = 95957201785025522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219040181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219040681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109520090 + 109520091.

It is an arithmetic number, because the mean of its divisors is an integer number (109520091).

Almost surely, 2^219040181 is an apocalyptic number.

It is an amenable number.

219040181 is a deficient number, since it is larger than the sum of its proper divisors (1).

219040181 is an equidigital number, since it uses as much as digits as its factorization.

219040181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 219040181 is about 14800.0061148636. The cubic root of 219040181 is about 602.8018778415.

The spelling of 219040181 in words is "two hundred nineteen million, forty thousand, one hundred eighty-one".