219596981 has 2 divisors, whose sum is σ = 219596982. Its totient is φ = 219596980.

The previous prime is 219596969. The next prime is 219597017. The reversal of 219596981 is 189695912.

219596981 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., 217828081 + 1768900 = 14759^2 + 1330^2 .

It is a cyclic number.

It is not a de Polignac number, because 219596981 - 2⁶ = 219596917 is a prime.

It is a super-2 number, since 2×219596981² = 96445668128628722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219596911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109798490 + 109798491.

It is an arithmetic number, because the mean of its divisors is an integer number (109798491).

Almost surely, 2^219596981 is an apocalyptic number.

It is an amenable number.

219596981 is a deficient number, since it is larger than the sum of its proper divisors (1).

219596981 is an equidigital number, since it uses as much as digits as its factorization.

219596981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 50.

The square root of 219596981 is about 14818.8049788099. The cubic root of 219596981 is about 603.3122196519.

The spelling of 219596981 in words is "two hundred nineteen million, five hundred ninety-six thousand, nine hundred eighty-one".