219373381 has 2 divisors, whose sum is σ = 219373382. Its totient is φ = 219373380.

The previous prime is 219373367. The next prime is 219373439. The reversal of 219373381 is 183373912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196953156 + 22420225 = 14034^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 219373381 - 2¹⁹ = 218849093 is a prime.

It is a super-2 number, since 2×219373381² = 96249360582742322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 219373381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219073381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109686690 + 109686691.

It is an arithmetic number, because the mean of its divisors is an integer number (109686691).

Almost surely, 2^219373381 is an apocalyptic number.

It is an amenable number.

219373381 is a deficient number, since it is larger than the sum of its proper divisors (1).

219373381 is an equidigital number, since it uses as much as digits as its factorization.

219373381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 219373381 is about 14811.2585893299. The cubic root of 219373381 is about 603.1073801254.

The spelling of 219373381 in words is "two hundred nineteen million, three hundred seventy-three thousand, three hundred eighty-one".