219484961 has 2 divisors, whose sum is σ = 219484962. Its totient is φ = 219484960.

The previous prime is 219484957. The next prime is 219485003. The reversal of 219484961 is 169484912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212430625 + 7054336 = 14575^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 219484961 - 2² = 219484957 is a prime.

It is not a weakly prime, because it can be changed into another prime (219484921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109742480 + 109742481.

It is an arithmetic number, because the mean of its divisors is an integer number (109742481).

Almost surely, 2^219484961 is an apocalyptic number.

It is an amenable number.

219484961 is a deficient number, since it is larger than the sum of its proper divisors (1).

219484961 is an equidigital number, since it uses as much as digits as its factorization.

219484961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 219484961 is about 14815.0248396687. The cubic root of 219484961 is about 603.2096157370.

The spelling of 219484961 in words is "two hundred nineteen million, four hundred eighty-four thousand, nine hundred sixty-one".