219904105512881 has 2 divisors, whose sum is σ = 219904105512882. Its totient is φ = 219904105512880.

The previous prime is 219904105512809. The next prime is 219904105512989. The reversal of 219904105512881 is 188215501409912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219852057653281 + 52047859600 = 14827409^2 + 228140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219904105512881 is a prime.

It is a super-2 number, since 2×219904105512881² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (219904105512281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109952052756440 + 109952052756441.

It is an arithmetic number, because the mean of its divisors is an integer number (109952052756441).

Almost surely, 2^{219904105512881} is an apocalyptic number.

It is an amenable number.

219904105512881 is a deficient number, since it is larger than the sum of its proper divisors (1).

219904105512881 is an equidigital number, since it uses as much as digits as its factorization.

219904105512881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 56.

The spelling of 219904105512881 in words is "two hundred nineteen trillion, nine hundred four billion, one hundred five million, five hundred twelve thousand, eight hundred eighty-one".