219378241 has 2 divisors, whose sum is σ = 219378242. Its totient is φ = 219378240.

The previous prime is 219378221. The next prime is 219378253. The reversal of 219378241 is 142873912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198218241 + 21160000 = 14079^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 219378241 - 2⁷ = 219378113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219378241.

It is not a weakly prime, because it can be changed into another prime (219378221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109689120 + 109689121.

It is an arithmetic number, because the mean of its divisors is an integer number (109689121).

Almost surely, 2^219378241 is an apocalyptic number.

It is an amenable number.

219378241 is a deficient number, since it is larger than the sum of its proper divisors (1).

219378241 is an equidigital number, since it uses as much as digits as its factorization.

219378241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 219378241 is about 14811.4226528042. The cubic root of 219378241 is about 603.1118338415. Note that the first 3 decimals are identical.

The spelling of 219378241 in words is "two hundred nineteen million, three hundred seventy-eight thousand, two hundred forty-one".